The Quick-Grip Irwin Xtreme Pressure One-Handed Clamps offers a clamping pressure of 250kg. Smooth and powerful, the single-handed operation produces up to a quarter of a ton of pressure. The 95mm deep jaws have full face clamping pads and a lockable swivelling action. Locked, both jaws remain parallel; unlocked, allows clamping of uneven surfaces. In both modes, the clamping pressure remains constant and evenly distributed. The bar clamp has an I-beam cross section to prevent flexing and add strength. A support foot helps when loading items into the clamps. Changing from clamping to spreading is tool-free allowing you to reverse the jaws in a matter of seconds. Clamping capacity 300mm(12"), spreading capacity 570mm(22").