Tongue-and-groove pliers Knipex Alligator 250 mm — steel jaws, plastic/steel handles

Knipex Alligator tongue-and-groove pliers, 250 mm, are professional water pump pliers constructed from hardened steel with combined plastic and steel handles. The tool features an adjustable multi-position jaw that locks securely in one-handed operation, enabling controlled gripping and turning of pipes, fittings and profiles. Compact jaw dimensions and precise German manufacturing provide reliable performance for plumbing, mechanical and general maintenance tasks where strong, stable clamping is required.

Advantages

The hardened steel construction ensures durability and resistance to wear under repeated use. The multi-position tongue-and-groove adjustment provides a secure, slip-resistant grip across a wide range of diameters without the need for additional tools. Combined plastic and steel handles give a balance of ergonomic comfort and structural strength while improving control during heavy-duty operations. Compact jaw geometry allows access in confined spaces and facilitates precise positioning on pipes and fasteners.

Suitable for

• Gripping and turning metal and plastic pipes
• Holding profiles, flat workpieces and fittings during assembly
• Maintenance and repair tasks in plumbing and HVAC
• Mechanical and general workshop use requiring adjustable clamping

Key specifications

• Overall length: 250 mm
• Jaw construction: hardened steel
• Handles: combined plastic and steel for comfort and strength
• Jaw adjustment: multiple tongue-and-groove positions for a range of diameters
• Jaw dimensions (approximate): 73 × 25 × 28 mm
• Manufacture: Germany

How to use

Open the pliers and select the appropriate tongue-and-groove position for the diameter of the workpiece, then close until the jaw locks into place. Apply steady pressure to grip the pipe or fitting and perform turning, holding or pulling operations with controlled force. For one-handed adjustment, depress the release lever, reposition the jaw and allow it to engage before applying torque. After use, wipe clean and store in a dry tool box to maintain jaw performance.

Usage recommendations

Use the pliers within their intended capacity; avoid striking the tool with a hammer or using it as a hammer. Inspect the jaws regularly for wear and ensure the locking mechanism functions smoothly. For corrosion protection, clean metal surfaces after exposure to moisture and apply light oil if necessary.