Product details:

Specifications of the irwin 10505942 clamping capacity 150mm (6in) spreading capacity 420mm (16in). The clamp offers xtreme pressure which is two times greater than all of its competitors. Full face pads and a supporting foot have been added, plus lockable swivel jaws to ensure that both jaws are always parallel and pressure is evenly distributed when gluing. A single handed clamp offering a clamping pressure 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 you to place larger items in the clamping jaws hands-free.