Locking pliers Irwin 12L3 — 300 mm length, 7.9 cm jaw length

Irwin 12L3 locking pliers — 300 mm length, 7.9 cm jaw length are heavy-duty large-jaw locking pliers designed for clamping, holding and turning metal parts, pipes and fasteners. With an overall length of 300 mm and a jaw length of 79 mm, these pliers provide a stable, hands-free grip through an adjustable locking mechanism that stays set for repetitive work. Constructed to withstand workshop, automotive and construction environments, the tool is intended to support tasks such as tightening, twisting, clamping and holding components for cutting or welding operations.

Advantages

The large jaws and strong clamping force enable the pliers to grip a wide range of shapes and sizes, making them suitable for work on pipes, rounded or irregular surfaces and fasteners. An adjustable screw lets you set the clamping pressure and maintain that setting for repetitive tasks, while the trigger release allows controlled unlocking. The pliers are built from heat-treated alloy steel for durability and wear resistance, and the hardened teeth are designed to bite and hold from different angles.

Suitable for

• Automotive repair and maintenance
• Plumbing and pipe fitting
• Welding preparation and holding during fabrication
• General workshop assembly and disassembly tasks

Key specifications

• Overall length: 300 mm
• Jaw length: 79 mm
• Tool type: locking pliers (large jaw)
• Adjustable locking screw for clamping pressure
• Material: heat-treated alloy steel construction
• Hardened teeth for enhanced grip from multiple angles

How to use

Position the jaws around the workpiece and turn the adjustment screw to set the desired clamping pressure. Squeeze the handles until the pliers lock in place; the mechanism will hold the set pressure so you can work hands-free. To release, operate the trigger-style release to disengage the lock, then open the jaws. Use the hardened teeth to achieve a secure grip on pipes, fasteners or irregular shapes, and adjust the screw as needed for different material thicknesses.

Usage recommendations

For safe, effective use: select a clamping pressure that secures the workpiece without crushing it, inspect the pliers for wear or damaged teeth before use, and avoid using the tool as a substitute for a dedicated pipe wrench or torque-controlled fastener tool when precise torque is required.