Simply the best there is - featuring the largest clamping surface of any bar clamp available. K-Body clamp faces are also designed to maintain parallel positions at right angles to the rails. This combination helps distribute pressure over the whole area of the jaws and deters warping tendency in large workpieces such as table tops and doors. The steel jaws are encased in a material that is glue resistant and anti-marring. The zinc plated steel rails are serrated on all six faces, virtually eliminating slippage by means of a unique locking device. When used with KP Blocks, the K-Body Clamps give you a useful, dependable clamping system for almost any application.