These pneumatic pull clamps provide very quick and secure fastening for repetitive machining operations. The clamp base receives a customized pin based on the thickness of the part you are clamping. When air pressure is applied, the pin is pulled downward and secured into position by a wedge mechanism, which provides a high clamping force. The body is made from 1045 induction hardened steel with a black oxide finish. The cylinder is made from 4140 steel, treated with Isonite.