Tongue-and-groove pliers Knipex 88 05 250 — 250 mm length, max pipe Ø 50 mm, max nut 46 mm

Knipex 88 05 250 tongue-and-groove pliers, 250 mm length, are designed for gripping, turning and holding pipes, fittings and nuts. These pliers accept pipes up to 50 mm in diameter and nuts up to 46 mm across flats. The slim head and joint area improve access to confined workspaces, while a robust box-joint design and hardened gripping surfaces provide stable clamping and long service life. The tool weighs approximately 344 g and features ergonomic two-colour multi-component sleeves for improved handling.

Advantages

The pliers offer 9-notch adjustment positioning, giving around 30% more gripping capacity than conventional water pump pliers of the same length. Special hardened teeth (approx. 61 HRC) ensure high wear resistance and secure gripping on pipes and nuts. A self-locking action reduces slip and hand force required. The box-joint construction provides increased stability through a double guide, and a protective guard reduces the risk of finger pinching. Made from chrome vanadium electric steel, forged and oil-hardened, the construction is robust and insensitive to dirt, making the tool suitable for outdoor use.

Suitable for

• Plumbing work: tightening and loosening pipes, fittings and connectors
• Assembly and maintenance tasks on machinery and equipment
• Outdoor and construction use where dirt resistance is required
• Situations requiring access in confined spaces due to slim head design

Key specifications

• Overall length: 250 mm
• Maximum pipe/tube diameter: 50 mm
• Maximum nut size (across flats): 46 mm
• Adjustment: 9-notch tongue-and-groove
• Teeth hardness: approx. 61 HRC
• Weight: approx. 344 g
• Material: chrome vanadium electric steel, forged and oil-hardened
• Design features: box-joint double guide; slim head and joint area; finger guard
• Handles: slim two-colour multi-component sleeves without collar

How to use

Select an appropriate adjustment notch so the jaws fit the pipe or nut securely, then position the pliers on the workpiece and apply steady hand pressure to turn or hold it. The self-locking action reduces the need for continuous squeezing; reposition to a larger notch when working on bigger diameters. Use the slim head to reach into tighter spaces and take care to keep the gripping surfaces clean and free of debris for reliable operation.

Usage recommendations

For safe and effective use, inspect the tool before each job, avoid excessive force beyond the tool’s rated capacities, and store in a dry place. Clean the gripping surfaces after use and periodically lubricate the joint. Use appropriate personal protective equipment such as gloves and eye protection when working with pipes and fittings.