5 Best Tongue-and-Groove Pliers (2026) — Expert Reviews

Please note: Product availability and information are based on our research at time of writing and are subject to change. Always check Amazon for the latest details before purchasing. Reviews remain editorially independent.

Introduction

Tongue-and-groove pliers, also sold as groove-joint or water pump pliers, are adjustable pliers whose lower jaw slides to preset positions along a tongue-and-groove track. That lets one tool open to a range of sizes, which is why they’re a common plumbing tool. They’re a distinct tool with a distinct job: gripping and turning nuts, fittings and fasteners you can reach, and holding one part while you turn another.

They are not a substitute for a pipe wrench. A pipe wrench is built to bite into round pipe under load, and it’s the better tool for larger pipe or when you need real torque (see our best pipe wrenches review). This roundup covers the pliers themselves, matched by size and style: a large-capacity pair, a long traditional pair, a compact pair, an all-purpose single pair, and a budget set.

Quick Comparison Table

Full Reviews — 5 Best Tongue-and-Groove Pliers, One for Every Job

1. KNIPEX Cobra XL 16-Inch Water Pump Pliers (87 01 400 US) — Best Large-Capacity Pick

🔩 Best Large-Capacity Pick

The KNIPEX Cobra XL is the largest tool here and the only one that the manufacturer positions against small pipe wrenches. The listing title gives a 3-3/4-inch jaw capacity on a 16-inch body, and the listing describes 27 adjustment positions set with a push button directly on the workpiece, a box-joint design and a pinch guard. It lists the tooth hardness as approximately 61 HRC and states the pliers are made in Germany.

KNIPEX’s own description compares the Cobra XL favorably with pipe wrenches on weight and gripping capacity. That is the manufacturer’s comparison, and it doesn’t change the distinction this article draws: for larger threaded pipe or when you need serious torque, a pipe wrench is still the better tool (see our best pipe wrenches review). Where the Cobra XL earns its place is capacity and reach on nuts, fittings and fasteners that a smaller pair can’t span. It’s also the highest price tier in this roundup by a wide margin.

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2. Channellock 460 16-Inch Tongue and Groove Pliers — Best Long-Reach Traditional Pair

📏 Best Long-Reach Traditional Pair

The Channellock 460 is the traditional take on the tool: a long, slide-adjust tongue-and-groove pair rather than a push-button design. The listing gives its dimensions as 16.5 inches long and lists a weight of 2.7 pounds. It describes right-angle, laser heat-treated teeth, an undercut tongue-and-groove construction meant to resist slipping, a PERMALOCK fastener, a reinforcing edge and high carbon steel with a rust-prevention coating.

Those specifics are the manufacturer’s descriptions, not results we measured. What the format offers is straightforward: long handles for leverage and reach into recessed spots, at a much lower price tier than the KNIPEX. The listing text we reviewed doesn’t state where it’s made, so we don’t make any country-of-origin claim for it. Like the KNIPEX, it’s larger than a small job needs, and for round pipe under real torque a pipe wrench is the better choice.

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3. IRWIN VISE-GRIP GrooveLock 6-Inch Pliers (4935351) — Best Compact Pick

🧰 Best Compact Pick

The IRWIN GrooveLock is the compact option: a 6-inch, V-jaw pair with a push-button lower jaw. The listing states the button adjusts the jaw twice as fast as traditional groove-joint pliers and that its multi-groove ratcheting system has twice the groove positions of other groove-joint pliers. Both are manufacturer comparisons we haven’t verified. It also lists ProTouch grips, right-angle teeth and a metal-injection-molded construction.

Its value is size. A 6-inch pair fits into cramped spots under a sink or behind a fixture where a longer pair can’t swing, and it’s small enough to live in a tool bag or a kitchen drawer. The trade-off is the flip side of the same size: less leverage and a smaller jaw opening. For larger fasteners or fittings, step up to a longer pair.

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4. WORKPRO 10-Inch Groove Joint Pliers, Fast-Adjust — Best All-Purpose Single Pair

🔧 Best All-Purpose Single Pair

The WORKPRO is the middle of the size range: a 10-inch pair with a spring-loaded push button that adjusts the lower jaw. The listing gives a jaw capacity of up to 1-9/16 inches with 12 adjustable positions, describes a V-jaw with angled teeth, and lists chrome vanadium steel with a polished jaw and black phosphate finish for corrosion resistance. Its listed weight is 11.36 ounces.

It’s the pick if you want a single pair rather than a set. Ten inches gives more leverage and reach than the IRWIN without the size of the 16-inch pairs, and the listing describes plastic-dipped bi-material handles for grip. It’s priced in the lowest tier here. The usual limits apply: its jaw opening is far smaller than the KNIPEX, and for round pipe under real torque a pipe wrench remains the better tool.

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5. TOPLINE 4-Piece Groove Joint Pliers Set (12, 10, 8 and 6 Inch) — Best Budget Multi-Size Set

🧺 Best Budget Multi-Size Set

The TOPLINE set covers the size range in one purchase: 6, 8, 10 and 12-inch pliers. The listing describes drop-forged steel with heat-treated jaws, a polished surface for corrosion resistance, bi-material grips, and a tongue-and-groove design for grasping and turning. For a household building a first toolbox, four sizes at a low price tier is the appeal.

The trade-off with any budget set is that you’re buying breadth, not the refinements of a single premium tool. The listing describes a tongue-and-groove adjustable jaw rather than a push-button mechanism, and it gives less detail on specifications such as jaw capacity per size than the single-pair listings do. If you already own a good 10-inch pair, a set adds little; if you own none, it fills the size range in one step. Our best plumbing tool kits review covers what else belongs in a starter kit.

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Buying Guide — Choosing Tongue-and-Groove Pliers

Groove-Joint Pliers vs a Pipe Wrench

These are different tools for different jobs. Groove-joint pliers open to preset positions and grip nuts, fittings and fasteners you can reach. A pipe wrench has angled, serrated jaws that grip round pipe, and as our best pipe wrenches review explains, it bites harder the harder you pull, which suits threaded pipe but can damage a finished nut or bolt head. Reach for the pipe wrench on larger pipe or when you need more torque, and for the pliers on smaller nuts and fittings. Pliers can work in a pinch on a fitting you can reach, but they generally grip less securely than a wrench, as our basin wrench vs adjustable wrench comparison also notes.

Size and Reach

Size decides three things: the jaw opening, the leverage from the handles, and whether the tool fits the space. The listings give a range here, from a 6-inch pair to a 16-inch pair with a jaw capacity of 3-3/4 inches, and the 10-inch WORKPRO lists 1-9/16 inches. Longer handles give more leverage and reach but weigh more; the Channellock lists 2.7 pounds against the WORKPRO’s 11.36 ounces. If you’re buying one pair, a mid-size pair is the compromise, and a compact pair is the one that fits under a sink.

Adjustment Style

Three of the pairs here (KNIPEX, IRWIN and WORKPRO) describe push-button adjustment, which lets you change the jaw opening with one hand, and their manufacturers make speed claims we haven’t verified. The Channellock and TOPLINE listings describe a tongue-and-groove design without a push button, which is simpler and has fewer parts. Neither style is objectively better; push-button is more convenient, and a slide-adjust design has fewer moving parts.

Jaw Shape and Finish Protection

The teeth that give a pair its grip can also mark what they grip. On chrome, polished copper or other finished surfaces, wrap the fitting with electrical tape or a folded cloth first, the same precaution our best pipe wrenches review gives for pipe wrenches. On plastic nuts, go gently, since it’s easy to over-tighten them with a tool that has leverage.

Single Pair or a Set?

A single 10-inch pair covers many everyday jobs; a set adds a smaller pair for tight spaces and a larger pair for bigger fasteners. If you’re starting a toolbox from scratch, a set is the cheaper way to cover the size range, and our best plumbing tool kits review lists the other tools a home kit needs. If you already own a pair you like, add only the size you’re missing.

Where Pliers Fit With Your Other Tools

Pliers turn and hold, but they don’t cut or crimp. To cut copper or plastic pipe cleanly, see our best pipe cutters review, and for PEX connections see our best PEX crimp tools review. For the tight nut behind a faucet, a basin wrench is the right tool (see our best basin wrenches review). And for typical jobs where pliers earn their keep, such as loosening a stubborn slip-joint nut, see our guide to cleaning a P-trap and our guide to replacing a kitchen sink strainer.

Frequently Asked Questions

Q: Are tongue-and-groove pliers the same as Channellocks?

Tongue-and-groove pliers are the tool type, and Channellock is one brand that makes them, so the name is often used for the whole category. Groove-joint pliers and water pump pliers are other names for the same kind of tool, and several listings here use those terms.

Q: Can I use tongue-and-groove pliers instead of a pipe wrench?

Sometimes, in a pinch, on a fitting you can reach, but they generally grip less securely than a wrench, and that matters more as the job gets harder. For larger pipe, or when you need more torque, a pipe wrench is the better tool. Our best pipe wrenches review covers the options, and our basin wrench vs adjustable wrench comparison makes the same point about pliers.

Q: What size tongue-and-groove pliers do I need?

It depends on the jobs. A compact 6-inch pair fits tight spaces, a mid-size 10-inch pair gives more leverage and jaw opening, and a 16-inch pair adds reach and a much wider opening at the cost of size and weight. If you’re unsure, a set covers the range in one purchase.

Q: How do I avoid damaging a fitting with pliers?

Wrap chrome, polished or painted surfaces with electrical tape or a folded cloth before gripping, use only as much force as the job needs, and go gently on plastic nuts. If a fitting won’t turn without a lot of force, stop and reconsider, since a seized fitting is a job for the right tool or a plumber.

Conclusion — Which Pliers Should You Buy?

The right pair depends on the size of the jobs you do. For a single all-purpose pair, the WORKPRO 10-inch is the sensible middle. For tight spaces, the IRWIN GrooveLock 6-inch is the compact option, and for a first toolbox the TOPLINE 4-piece set covers four sizes at a low price tier. When you need reach and leverage, the Channellock 460 is the long traditional pair, and the KNIPEX Cobra XL is the large-capacity pick at the top price tier.

Whichever you choose, keep the distinction in mind: pliers for nuts and fittings you can reach, a basin wrench for the tight spot under the sink, and a pipe wrench for larger pipe or more torque. Our best plumbing tool kits review shows how these tools fit together in a complete home kit.

Prices and ratings may change. Always check Amazon for current prices.