KNIPEX 87 01 250, 10 in. Cobra® Water Pump Pliers, Capacity 2

The 10-inch Cobra Water Pump Pliers are designed for gripping pipes, nuts, and irregular workpieces securely without slipping. Built for trade professionals and home handymen alike, this tool solves the problem of unstable grip and frequent slipping that often occurs with standard adjustable pliers.

A primary feature is the push-button adjustment system, offering 25 precise positions directly on the workpiece. This fine adjustment pairs with a wide jaw capacity of up to 2 inches, allowing the tool to fit a broad range of shapes and fastener sizes. The gripping surfaces utilize specially hardened teeth rated at 61 HRC, which bite firmly into materials and help maintain high wear resistance during heavy use.

For everyday operation, the self-locking mechanism engages securely on pipes and nuts, requiring low hand force from the user while preventing tool slip. The physical construction relies on a box-joint design with a double guide for increased mechanical stability under load. Additionally, an integrated pinch guard is engineered directly into the handles to prevent fingers from being pinched during sudden adjustments or heavy squeezing.

In terms of limitations, the maximum jaw opening is capped at 2 inches, which means larger plumbing fixtures or oversized fittings will require a bigger tool. The listing also focuses strictly on the mechanical jaw and joint specs, without stating specific handle grip coatings or total tool weight.

Verdict: These 10-inch water pump pliers are a solid choice for anyone needing a secure, non-slip grip on pipes and nuts up to 2 inches. They provide reliable stability and quick push-button sizing for everyday mechanical and plumbing tasks.

• Tool Length: 10 inches
• Maximum Jaw Capacity: Up to 2 inches
• Adjustment Positions: 25 positions
• Teeth Hardness: 61 HRC
• Joint Type: Box-joint with double guide

A great fit if you:

• Need to grip pipes, nuts, and various shapes up to 2 inches across.
• Want rapid sizing directly on the workpiece using a 25-position push button.
• Prefer a self-locking tool that minimizes required hand force and prevents slipping.
• Value safety features like a built-in finger pinch guard.

Consider something else if you:

• Regularly work on fittings or pipes larger than 2 inches in diameter.
• Need a more compact plier for extremely tight spaces where a 10-inch tool is too large.

What is the maximum jaw opening on these pliers?
The jaws open up to a maximum capacity of 2 inches, allowing them to grip a variety of shapes and sizes.

How do you adjust the jaw size?
You adjust the tool by pressing a button directly on the workpiece, choosing between 25 distinct positions.

How hard are the gripping teeth?
The gripping surfaces feature specially hardened teeth rated at 61 HRC for secure holding power.