These Snap clamps use a unique snap-on system to provide uniform and positive clamping in one smooth operation. As the handle is moved forward, the internal mechanism works to build tension. At a specified point, the tension is released and transformed into clamping force. This allows uniform clamping force with every cycle. They offer excellent durability and will not become weak or unstable after repeated use like traditional toggle clamps. Supplied with a steel spindle. Urethane tip style spindles are also available. The body and clamping arm are made from alloy steel with a black finish. The handle is chrome plated steel with plastic knob. Cover plates which help to keep debris out of the clamps are also available.