Shark Adjustable Sheet Metal Clamp, 5" max opening, 1000lbs clamp pressure, pressed steel & riveted body design, precise scissor action. Pivoting hinge with mounting hole and serrations. Quick-Acting Button allows the handle to be pushed quickly to desired postion without having to screw. Curved clamp arms: step over beams & flanges, with swivel pads: clamp angled surfaces. Bottom swivel pad can be mounted to bench and top arm can swing away for loading & unloading. For sheet metal and auto body panel repair.