These cam action handles are used in conjunction with strap clamp assemblies to clamp and unclamp workpieces. Attach the handle to a strap clamp eyebolt, custom-made drawbar or to an open clamp strap with a pin and retaining ring (not included). For full tightening, the cam lever knob is pushed down. To loosen clamping, the handle is pulled up, releasing clamping force. The cam handle is made from quenched and tempered 4135 steel, with a black oxide finish. The ball knob is made from phenolic plastic.