The Knipex 00 20 06 US1 3 Pc Cobra Pliers Set is a three-piece water pump pliers set built for gripping pipes, nuts, fittings, and irregular shapes across a wide size range. This is a water pump pliers set designed for gripping, turning, and holding round, flat, square, and hex workpieces. Model Number: 00 20 06 US1. If you want one set that covers service work, plumbing repairs, shop use, and general mechanical tasks without bouncing between different pliers, this is the kind of set that earns drawer space fast.

What makes the Cobra design matter is how it works in real use. The push-button adjustment lets you size the jaws directly on the workpiece, so you are not hunting for the right setting every time you move from one fitting to the next. Fine adjustment gives each tool a more precise fit, which helps with comfort and control, especially when you are working in awkward spots or making repeated adjustments through the day.

Knipex also builds these to hold under load. The self-locking action on pipes and nuts means the jaws bite and stay put instead of skating off the surface. That reduces the grip force you need from your hand, which matters when you are breaking loose tight connections or holding material steady for a second operation. The gripping surfaces use specially hardened teeth at about 61 HRC, so the bite stays reliable while wear stays low over time.

From a build standpoint, this set is more than just three sizes of the same pliers. The box-joint design gives the tools high stability because of the double guide, and that shows up as less flex when you are really leaning on them. The forged chrome vanadium electric steel construction, paired with oil-hardening, is the kind of material spec that matters because it supports long-term durability instead of turning into sloppy jaws after hard use. The polished jaws and grey atramentized finish round out the working surfaces without changing what the tool is really about, which is dependable grip.

Jobsite practicality is where this set separates itself from cheaper tongue and groove pliers. The pinch guard helps protect your fingers during adjustment, and the hinge bolt is designed to catch reliably so the setting does not shift unintentionally. That is the kind of detail you notice when you are working one-handed in a cabinet, at a mechanical room connection, or around existing pipe where there is not much room for mistakes.

This set includes three sizes: 7-1/4 inch, 10 inch, and 12 inch Cobra water pump pliers. The smallest tool gives you compact access and up to 1-1/2 inch round pipe capacity. The middle size stretches to 2 inches. The largest reaches 2-3/4 inches, which is enough capacity to handle a lot of larger plumbing and mechanical fittings without stepping up to a much bulkier wrench. Knipex also includes a molded plastic tray, which makes this a smart fit for workbench drawers and service carts where keeping tools organized actually saves time.

Who should buy it? Plumbers, HVAC techs, mechanics, maintenance crews, remodelers, and serious DIY users who are tired of slipping pliers and inconsistent adjustment. If your work regularly involves pipe, valves, compression fittings, locknuts, or odd-shaped material, this set gives you a compact-to-large progression that covers a lot of ground without wasting space on filler pieces.

Why the Knipex 00 20 06 US1 3 Pc Cobra Pliers Set earns its keep

This is the kind of pliers set you buy once, use constantly, and wonder why you put up with cheaper tongue and groove pliers for so long.

• Who it's for: Plumbers, HVAC techs, mechanics, maintenance crews, and serious DIY users who need dependable grip across a wide range of pipe and fitting sizes.
• Why it stands out: The push-button adjustment is quick, the self-locking bite actually hangs on, and the three-size spread covers a lot of real work without overcomplicating the drawer.
• Worth knowing: This is a dedicated gripping set, not a general mixed pliers kit. If your work centers on pipe, valves, locknuts, and fittings, that is exactly why it makes sense.

• What type of tool is this? It is a three-piece water pump pliers set, also commonly used as tongue and groove style gripping pliers for pipe, nuts, and irregular shapes.
• What is the largest gripping capacity in the set? The 12 inch Cobra pliers in this set grip round pipe up to 2-3/4 inches.
• Are these insulated for electrical work? No. The product data lists these as not 1000-volt insulated.
• How are the pliers stored? The set includes a plastic tray with custom molded cavities for each tool, which is useful for workbench drawers and cabinet storage.