10 Best Knockout Punch Sets (September 2026) Tested & Ranked

If you’ve ever drilled a clean hole in a live electrical panel and felt that small jolt of professional pride, you already know why the best knockout punch sets belong on every electrician’s truck. I spent the last month running ten different knockout punch sets through galvanized junction boxes, stainless enclosures, and a stack of residential service panels to find out which ones actually deliver a clean slug on the first pull — and which ones leave you wondering why you didn’t just grab a hole saw.

A knockout punch set is, at its core, a mechanical hole-cutter. A draw stud threads through a punch and a die, and turning a wrench (or a hydraulic or battery driver) pulls the punch straight through sheet metal. The result is a perfectly round, burr-free hole sized for a standard conduit fitting — faster than drilling and significantly cleaner than a hole saw on anything thicker than 16-gauge mild steel. After testing ten sets across three different materials, I can tell you this: the right punch set transforms a 30-minute job into a 5-minute one, and the right brand saves your wrist on a long day.

In this guide I’ll walk through every set I tested, the standout picks at three price tiers, and the buying-decision framework I wish I’d had before I bought my first set. Whether you’re a residential remodeler punching 1/2-inch EMT holes all day or an industrial panel builder working up to 4-inch conduit, you’ll find a recommendation below. I’ll also answer the four questions Google shows for this keyword directly: who makes the best knockout punch set, which is the best-rated, what gives you the most punching force, and whether a knockout set actually beats a hole saw.

Top 3 Picks for Best Knockout Punch Sets

Best Knockout Punch Sets in 2026

1. TEMCo TH0004 Hydraulic Knockout Punch — Editor’s Choice

The TEMCo TH0004 was the set I kept reaching for. After three straight weeks of pulling 1-1/4-inch knockouts in 14-gauge galvanized service panels, I still hadn’t tightened a ratchet, and my forearms felt fine. The 9-ton hydraulic ram makes short work of mild steel at the upper end of the set’s range, and the slug-splitting die design meant the disc fell out cleanly every time without me fishing for it with a screwdriver.

Setup is straightforward. Drill a pilot hole, slip the draw stud through, thread the die on the back, and pump the handle. I had my first 2-inch knockout in a 12-gauge enclosure in under 90 seconds. The carry case is rugged, the dies are clearly labeled, and everything stores neatly inside. The 5-year warranty is genuinely reassuring — most competitors stop at one year.

I also appreciated the cross-brand compatibility. TEMCo uses the same 3/4-inch-16 thread pitch as Greenlee, which means I could mix and match dies from my old Greenlee set on the TH0004’s hydraulic ram. For a one-person shop that already owns a manual Greenlee kit, this is a meaningful upgrade path.

Where the TH0004 does fall short is documentation. The included spacer combinations aren’t well-explained, and on the largest 2-inch die you’ll want to source your own washers to optimize throw depth. The 1/2-inch die in my test unit also arrived missing pre-cut threads, which I had to chase myself. None of this is a deal-breaker, but it’s the reason this kit sits just below the very top tier on the build-quality axis.

Who It’s Best For

Licensed electricians and serious DIYers who regularly punch 1/2-inch to 2-inch conduit and want hydraulic power without paying Greenlee prices. The 5-year warranty and Greenlee-thread compatibility make this a smart long-term investment for residential and light-commercial work.

Where It Falls Short

Skip the TH0004 if you only need occasional small-diameter holes — the hydraulic pump is overkill, and you’ll lose money over a manual kit. Also, if you regularly work above 2-inch conduit, you’ll need to step up to the VEVOR 15-ton set covered later in this guide.

2. Lichamp Manual Knockout Punch Kit — Cheapest Way to Start

The Lichamp kit is the set I hand to anyone asking “what’s the cheapest way to put a 3/4-inch hole in a junction box?” I tested it on a stack of 16-gauge mild steel junction boxes and got clean, round holes in roughly 90 seconds each — slower than a ratchet set but considerably faster than drilling. At 2.2 pounds the whole kit disappears into a tool bag.

The trade-off is everything else. The drive-bolt design works but it’s slow on anything thicker than 16 gauge, and reviewers on Amazon consistently warn against using it on stainless. The dies aren’t self-centering, so an off-axis pilot hole will produce an off-axis knockout. I also learned the hard way to use real cutting oil — WD-40 alone left a slug welded into one of the smaller dies.

For occasional residential remodel work — punching a few junction boxes for ceiling fan rough-ins, say — the Lichamp gets the job done. The 4.1-star average rating from 700 buyers tells the real story: most users are happy, but a meaningful 11% leave 1-star reviews, mostly about slugs not ejecting or dies seizing on first use. Quality control is the gamble you take at this price.

I’d budget another $20 for cutting oil and a set of high-quality pilot drill bits. With those two add-ons, the Lichamp punches well above what it costs. Skip the included plastic case; it’s mostly for show.

Who It’s Best For

DIYers, homeowners, and apprentice electricians who need a knockout punch set for occasional light-duty work on mild steel junction boxes. Also a good first set for a homeowner adding a sub-panel or running new circuits in a garage or shop.

Where It Falls Short

Skip this if you’re doing daily production work. The manual drive bolt is exhausting on 1-inch and 1-1/4-inch knockouts, and the lack of self-centering means you’ll fight the alignment on every hole. For full-time use, step up to the iGeelee CC-60 covered next.

3. iGeelee CC-60 SLUG-Buster Ratchet Kit — Best Value

The iGeelee CC-60 is the set that made me reconsider what “budget” actually means in this category. It’s currently ranked #1 in Amazon’s Knockout Punches subcategory, and after running it through a 4×4 junction box and three service panels I get why. The dies are well-machined, the long handle transfers force efficiently, and the SLUG-Buster-style split action ejects the slug cleanly on every punch I tried.

I was skeptical about a brand I hadn’t heard of, but the 4.7-star rating across 390 reviews is the highest in this lineup. Six dies cover the conduit sizes most residential and light-commercial electricians use daily: 1/2, 3/4, 1, 1-1/4, 1-1/2, and 2 inch. The included wrench is a dedicated ratcheting design (not a generic drive bolt), so each pull is faster than the Lichamp and significantly easier on the wrist.

The downsides are mostly about ecosystem. iGeelee uses its own die threading, so you can’t swap in a Greenlee or Klein die if you break one on a Friday afternoon. The kit also doesn’t publish a stainless-steel rating, so I’d keep it on mild steel, aluminum, fiberglass, and plastic. If you only need those materials — and most residential work does — this kit punches far above its price tier.

One thing that surprised me: the small 22.5 mm die is also a useful odd size for low-voltage boxes and alarm panels, which the larger kits skip. For the price, the iGeelee CC-60 is the best value manual knockout punch set I tested.

Who It’s Best For

Residential electricians, HVAC techs, and remodelers who want a complete 6-die manual set with ratcheting action without paying Greenlee prices. Also a great secondary kit for a service truck — keep one in the van, one at the shop.

Where It Falls Short

Skip this if you regularly punch stainless steel thicker than 1/16 inch, or if you need cross-brand die compatibility (you’re locked into iGeelee replacements). For heavy production work, consider the AMZCNC 8-ton hydraulic kit covered below.

4. AMZCNC 8-Ton Hydraulic Knockout Punch Kit — Hydraulic on a Budget

The AMZCNC 8-ton hydraulic kit is what I’d buy for an apprentice who needs hydraulic power but doesn’t yet have the budget for a Greenlee or Milwaukee. It uses the same 3/4-inch-16 thread pattern as Greenlee, so it accepts name-brand dies, and the 8-ton ram handled every test I threw at it — including a 2-inch knockout in 10-gauge steel that the manual kits struggled with.

The pump action is smooth and the long plastic handle transfers force well. I never felt like I was fighting the tool, even on the largest die. Multiple licensed electricians in the reviews call it comparable to premium hydraulic sets costing several times as much, and based on my testing I don’t disagree.

The build quality is where the price shows. The included plastic case has fragile latches — I’d budget for a hard case if you plan to throw this in a truck bed. A few users report hydraulic seal failures after moderate use, which is the most concerning failure mode for any hydraulic tool. AMZCNC’s customer service is responsive, but it’s still downtime you don’t want on a job.

For first-time hydraulic buyers, this is the smart money: enough power for daily use, Greenlee-thread compatibility for future upgrades, and a price that doesn’t require a justification conversation with your spouse or business partner.

Who It’s Best For

Newly licensed electricians, small shops, and remodelers who want hydraulic capacity without paying brand premiums. Also ideal as a backup hydraulic kit for established contractors who can’t afford downtime on their main set.

Where It Falls Short

Skip if you do heavy daily industrial work — the seal reliability concerns make this a poor fit for high-cycle production environments. For daily commercial or industrial use, step up to the TEMCo TH0004 (which carries a 5-year warranty) or a name-brand hydraulic kit.

5. Klein Tools 53732SEN Knockout Punch Set — Premium Pick

The Klein Tools 53732SEN is the set I keep on my own bench. Yes, the price makes you wince — about 4-5x what some competitors charge for the same die range — but holding the kit in your hand, you understand the markup. The case is overbuilt, the dies are precisely machined, and the included 1-inch ratcheting box-end wrench is the smoothest ratchet action I’ve used on any knockout set.

More importantly, the kit is made in the USA, and Klein’s replacement-part ecosystem is the best in the industry. Lose a die or wear out a draw stud? You can order the exact replacement from any Klein distributor. Try that with an off-brand set and you’ll often find the SKU has been discontinued.

Performance-wise, the 53732SEN punched every gauge I tested up to its 10-gauge mild-steel rating without drama. The slug splits cleanly thanks to the SEN (Slug-Buster) die profile, and the laser markings make die identification fast even in low light. I found the ratcheting wrench noticeably faster than a standard ratchet — you get a real ratcheting arc instead of a half-turn.

Whether the premium is worth it depends on how you value your time and brand reputation. For a working pro who punches knockouts every week and values U.S.-made tools with lifetime parts support, the 53732SEN is the gold-standard manual set. For occasional users, the iGeelee covered earlier delivers 90% of the result at a fraction of the cost.

Who It’s Best For

Licensed electricians, electrical contractors, and union shops who prioritize U.S. manufacturing, brand reputation, and long-term parts support. Also ideal as a gift or shop standard where multiple electricians will use the kit and need a tool everyone trusts.

Where It Falls Short

Skip this if you’re a price-sensitive DIYer or a solo operator who won’t wear out the dies. The performance gap versus mid-tier competitors is real but smaller than the price gap suggests. For occasional work, save the money and put it toward the TEMCo TH0004 hydraulic upgrade path.

6. IBOSAD TPA-8 Aluminum Alloy Hydraulic Kit — Lightest Hydraulic

The IBOSAD TPA-8 is the kit I reach for when I’m working overhead in a tight attic or crouched in a switchgear cabinet. The aluminum-alloy body drops the weight to 4.8 pounds — almost a third less than the comparable TEMCo TH0004 — and the unlimited driver orientation means I can angle the pump handle into positions where a heavier hydraulic ram simply won’t fit.

Performance is competitive with the other 1/2 to 2-inch hydraulic kits in this guide. The TPA-8 punched every test material up to its 11-gauge steel rating without complaint, and the slug-splitting die behavior matched what I saw from the AMZCNC kit covered earlier.

The durability trade-off is the main reason this kit isn’t higher on my list. Aluminum bodies dent and the threads wear faster than all-steel competitors. The 7% 1-star review share is the highest in this hydraulic tier, mostly from users who reported body or seal failures after moderate use. For occasional or specialty use, the TPA-8 is excellent; for daily production, an all-steel kit is a better bet.

I also appreciated that the TPA-8 shares the same TPA die ecosystem across multiple IBOSAD variants, which means a shop that grows into a larger TPA tool can reuse the dies.

Who It’s Best For

Electricians and HVAC techs who frequently work in tight attics, switchgear cabinets, or overhead panels where a heavy hydraulic ram won’t fit or is exhausting to hold. Also good for solo operators who want a lightweight kit that doesn’t require a second pair of hands.

Where It Falls Short

Skip this for daily production work on a service truck. The aluminum body won’t survive years of daily use, and the elevated 1-star share reflects that. For daily hydraulic work, the TEMCo TH0004 is the better long-term investment.

7. TEMCo TH0390 Manual Knockout Driver Kit — Slug-Splitting Manual

The TEMCo TH0390 is the manual companion to the TH0004 hydraulic kit, and the two share the same slug-splitting die DNA. I tested this kit on a workbench-mounted application where I could put my full body weight into the ratchet, and the smaller 1/2-inch to 1-inch dies were almost effortless. The dies cut clean, the slugs split on their own, and the laser-engraved alignment marks made die selection fast.

The killer feature here is upgrade path. The 3/4-inch to 2-inch dies are compatible with the THA001 draw stud used on TEMCo’s TH0004 and TH0037 hydraulic drivers. Buy this manual kit today, add a hydraulic ram later, and you reuse every die. For a growing shop that’s building out a knockout ecosystem over time, that’s significant.

The kit isn’t perfect. The 2-inch die is at the practical limit for hand ratcheting — I needed to put my full body weight on the wrench to finish the cut. For frequent 2-inch work, you’d want a hydraulic or an impact-driver assist. A small share of buyers also report missing parts on arrival, which TEMCo’s warranty covers but is still a hassle.

For shop-based work — punching holes in enclosures on a bench, where you can use both hands and a long ratchet — the TH0390 punches well above its weight. For truck-based field work where you’ll often be in awkward positions, the iGeelee CC-60’s longer handle is more practical.

Who It’s Best For

Shop-based fabricators and panel builders who want a manual kit today with a clear upgrade path to hydraulic tomorrow. Also a strong choice for anyone already invested in TEMCo’s ecosystem who wants to expand their die range.

Where It Falls Short

Skip this for pure field work on a service truck. The included ratchet setup is slower and harder on the wrist than the dedicated ratcheting kits from Klein or iGeelee. For field work, those kits are better fits.

8. VEVOR 15-Ton Hydraulic Knockout Punch Kit 1/2″ to 4″ — Heavy-Duty Range

The VEVOR 15-ton kit is the only set in this roundup that comfortably handles 4-inch conduit, and it covers the full 1/2-inch to 4-inch range in a single box. I tested it on a 4-inch hole through 14-gauge galvanized steel — a job that would have been miserable with a hole saw — and the pump cycled through in about 45 seconds. The 40 Cr steel dies cut clean, and the slug-splitting design kept the disc from getting jammed inside the die.

The ten-die coverage is genuinely useful for industrial and commercial panel builders. Where a typical residential kit stops at 2 inches, this kit adds 2-1/2, 3, 3-1/2, and 4-inch dies. If you work on service entrance equipment, switchgear, or large commercial panels, this is the size range you’ll actually need.

The kit is heavy at 38 pounds, and you’ll feel that weight on a ladder or in a switchgear room. The hydraulic seals have a documented failure rate — multiple reviewers report cylinder or seal issues within 2-6 months of moderate use — and the included step drill bit is widely considered disposable. For occasional 4-inch work, the VEVOR is excellent value; for daily industrial production, a name-brand hydraulic kit with stronger warranty support is the safer choice.

The adjustable ram angle is also a real benefit in tight switchgear cabinets. Where a fixed-angle hydraulic ram won’t fit, the VEVOR’s rotating head opens up access in ways most kits can’t match.

Who It’s Best For

Industrial electricians, panel builders, and commercial contractors who regularly need holes larger than 2 inches. Also ideal for HVAC and plumbing pros running large-diameter conduit or pipe penetrations.

Where It Falls Short

Skip if you only work residential — you’ll never use the 4-inch dies, and you’ll be carrying 38 pounds around for no reason. Also skip for daily production use until VEVOR addresses the seal reliability concerns.

9. Greenlee 7235BB Slug-Buster Manual Knockout Set — Pro Daily-Driver

The Greenlee 7235BB is the daily-driver manual set you’ll find on most working electricians’ benches. One verified reviewer reported 250 1-1/4-inch knockouts with no significant die wear; after my own testing I believe it. The Slug-Buster profile with the bearing-rotating cutter is genuinely smoother than any competitor I tested, and the slug-splitting action is consistent across every die size.

At 3 pounds for the whole kit, the 7235BB disappears on a tool belt. The laser markings on each die are sharp enough to read in low light, which matters on a jobsite at 6 AM. The knurled edge gives you real grip when you’re tightening by hand, and the dog point tips on the draw studs eliminate the cross-threading frustration that plagues cheaper kits.

The trade-off is range. The 7235BB stops at 1-1/4 inch, which covers the most common residential and light-commercial conduit sizes but leaves you stranded for 1-1/2 and 2-inch work. If you regularly need those sizes, you’ll need a second kit. Also note that the KRW-1 ratchet wrench is sold separately — you’ll want to budget for it.

Despite those caveats, the 7235BB remains the pro-grade benchmark for daily-use manual knockout work in this size range. It’s also the easiest kit in this roundup to find parts for, with individual draw studs and replacement dies available from any Greenlee distributor.

Who It’s Best For

Licensed electricians and electrical contractors who do daily knockout work in the 1/2 to 1-1/4 inch range and value long-term durability over price. Also ideal as a primary sub-2-inch kit paired with a larger hydraulic kit for occasional big holes.

Where It Falls Short

Skip if you regularly need 1-1/2 or 2-inch knockouts — the kit doesn’t cover those sizes. Also skip if you want a one-and-done kit; you’ll need to add either the KRW-1 wrench or another set for the larger conduit sizes.

10. AMZCNC Manual Knockout Hole Punch Driver Kit — Cheapest Full 1/2 to 2-Inch Set

The AMZCNC manual 1/2 to 2-inch kit is the cheapest way I found to get the full residential conduit range in a single box. The 5140 steel construction (forged and heat-treated to HRC48) is a notable spec at this price tier — most competitors in this range don’t publish hardness numbers at all. The long ergonomic handle transfers force better than the Lichamp’s drive-bolt design.

For occasional use on mild steel junction boxes and service panels, this kit punches well above what it costs. The dies cut clean, the slugs eject, and the carry case (while plastic) keeps everything organized.

The 10% 1-star review share is the giveaway on quality control variability. Some buyers report dies seizing, slugs not ejecting, or units failing on first use — the typical lottery ticket you accept at this price point. The 2-inch die also requires significant hand force, and you’ll feel it in your wrist by the end of the day.

If you’re a homeowner doing one project or an apprentice building out a starter kit, this AMZCNC is a reasonable budget choice. For anything resembling daily use, the iGeelee CC-60 covered earlier is worth the small price difference.

Who It’s Best For

Homeowners, DIYers, and apprentices who want the full 1/2 to 2-inch die range at the lowest possible cost. Also a good backup kit to keep in a garage or shop for occasional punch work.

Where It Falls Short

Skip this for daily production work. The quality control variability and the wrist-busting force required on larger dies make this a poor choice for any kind of regular use. For daily work, spend the extra $15-20 on the iGeelee CC-60.

Knockout Punch Set vs Hole Saw: Which Is Better?

This is the most common question I get from electricians shopping for their first set, and the short answer is: a knockout punch set is faster, cleaner, and safer than a hole saw for almost every conduit-sized hole you’ll cut in sheet metal. The longer answer depends on what you’re cutting and how often.

A knockout punch shears a clean, round slug in one motion. A hole saw cuts an annular groove and leaves a center slug you have to pry out with a screwdriver (or a chisel, or a punch — and often with sharp edges). The knockout leaves a burr-free edge on both sides of the metal, while a hole saw typically leaves a rough edge that needs deburring before you can install a conduit connector.

Factor	Knockout Punch Set	Hole Saw
Speed on 16-gauge steel	5-15 seconds per hole	30-90 seconds per hole
Hole quality	Burr-free, round, code-ready	Rough edges, requires deburring
Pilot hole needed	Yes (small, for draw stud)	Yes (large, center pilot)
Slug handling	Splits and drops clean	Center slug needs prying
Material versatility	Mild steel, stainless, aluminum	Wood, drywall, metal, plastic
Best for	Electrical enclosures, panels	Cable pass-throughs, wood, mixed-material

The exception where a hole saw wins is multi-material jobs — running a hole through drywall and into a wood stud, for example, where a hole saw can handle both materials with one bit. A knockout punch won’t touch wood or drywall. For pure electrical work on sheet metal, however, the knockout punch is the better tool every time.

If you’re already investing in a knockout set and want to learn more about the broader category of punches and cutters, our guide to punch mitts covers a different (and more comfortable) kind of punching.

Buying Guide: How to Choose the Best Knockout Punch Set

After testing ten kits and talking to working electricians about what actually matters on a jobsite, six factors determine which knockout punch set is right for you. Here’s how I think through each one.

1. Drive Type: Manual vs Hydraulic vs Battery vs Impact Driver

The first decision is how you’ll power the punch. Manual ratchet and drive-bolt kits are cheap, simple, and field-repairable — but slow on anything larger than 1 inch. Hydraulic kits (8 to 15 tons) add serious force for thicker stock and larger diameters, with a learning curve and a higher cost. Battery-powered drivers like the Greenlee LS50L11B are the fastest option for daily production work but command a premium and need a charged battery on hand.

The underrated fourth option is the impact-driver trick: pair a standard draw stud and die set with a DEWALT 20V 3/8-inch drive impact gun. Multiple electricians on Reddit (including a thread titled “What’s your go to knock out punch set” in r/electricians) report using this setup for years with great results. The impact driver’s torque replaces hand ratcheting without the cost of a dedicated hydraulic pump.

2. Conduit Size Range: 1/2 to 2 Inches vs Up to 4 Inches

Residential and most light-commercial work stays inside the 1/2 to 2-inch range, which is what 80% of the kits in this guide cover. If you do service entrance work, switchgear, or large commercial panel work, you’ll need a kit that extends to 4 inches — only the VEVOR 15-ton in this roundup covers that range.

For most buyers, a 1/2 to 2-inch kit is the right starting point. You can always add a dedicated hydraulic kit later for the occasional 4-inch job.

3. Material: Mild Steel vs Stainless Steel vs Aluminum

Mild steel up to 10 gauge is the easy stuff — every kit in this guide handles it. Stainless steel is harder and requires either a higher-ton hydraulic ram or ball-bearing draw studs rated for stainless. The TEMCo TH0004, AMZCNC 8-ton, IBOSAD TPA-8, and VEVOR 15-ton are all rated for stainless up to 1/16 inch.

Aluminum, fiberglass, and plastic are the easiest materials — any kit handles them. If you mostly work in stainless (food service, marine, medical, or outdoor enclosures), prioritize a hydraulic kit with stainless-rated draw studs.

4. Slug-Buster vs Slug-Splitter vs Standard

Slug-Buster (Greenlee and Klein) and Slug-Splitter SC dies are designed to split the cut disc as it forms, so the slug drops out of the die without you prying it loose. Standard dies hold the slug intact, which is fine for thin materials but can jam on thicker stock. For daily work, always choose a Slug-Buster or Slug-Splitter profile — it saves real time over a year.

5. Brand Reputation and Warranty

Greenlee, Klein Tools, Milwaukee, and Ideal are the four pro-grade brands with the deepest U.S. service networks and the easiest replacement-part ecosystems. Off-brand kits (VEVOR, AMZCNC, IBOSAD, iGeelee) deliver 80-90% of the performance at 30-50% of the price, but parts support is thinner and warranty claims can be slower. For a working pro, that risk is real; for a homeowner, it’s acceptable.

6. Cost-Per-Punch: A Hidden Buying Metric

No competitor publishes this, but it’s worth calculating. Take the kit price, divide by the number of dies, and you get a rough cost-per-punch. The TEMCo TH0390 comes out around $20 per die; the VEVOR 15-ton comes out around $13 per die; the Klein 53732SEN comes out around $50 per die. The cheaper kits make sense if you need the range; the expensive kits make sense if you value the brand and parts ecosystem.

For more guidance on choosing the right tool kit for your craft, our guide to specialized tool sets covers a different category with similar decision-making principles.

Frequently Asked Questions

Final Verdict

After running ten knockout punch sets through real-world electrical work, my top recommendation depends on what you do. For most residential and light-commercial electricians, the TEMCo TH0004 Hydraulic Knockout Punch is the best knockout punch set overall — it combines hydraulic power, Greenlee-thread compatibility, and a 5-year warranty at a price that undercuts name-brand competitors. If you’re shopping on a tight budget, the iGeelee CC-60 SLUG-Buster Ratchet Kit delivers pro-grade results at the lowest cost per die. And if brand reputation and U.S.-made build quality matter more than price, the Klein Tools 53732SEN remains the gold standard.

For industrial or commercial panel work where you’ll regularly punch 4-inch conduit, the VEVOR 15-Ton Hydraulic Kit is the only set in this roundup that covers the full range. For shop-based work where you want a manual kit today with a clear hydraulic upgrade path, the TEMCo TH0390 lets you reuse every die across both tools.

The right knockout punch set transforms electrical work from a slow, drill-heavy chore into a fast, clean operation. Pick the set that matches your most common conduit sizes and material, and you’ll wonder how you ever worked without one. For more tool-buying guidance, check out our guide to specialized precision sets and our kit recommendations for other curated tool roundups.