The IRWIN® Quick-Grip® Xtreme Pressure Clamps can be operated with a single hand and offer a clamping force of 250kg. A tool-free, Quick-Change™ function allows the jaws to be reversed to perform a spreading action. Features longer length jaws with a unique swivelling action to keep constant pressure on uneven surfaces. They also have a bar rest to allow to be placed larger items, in the clamping jaws hands-free. Enhance your clamps with a wide range of Quick-Grip® Clamp Accessories. Clamping Capacity: 450mm (18in). Spreading Capacity: 720mm (28in).Clamping Force: 250kg.