1200 kg (2600 lb) capacity; 5-1/2″ throat depth; Drop forged, electro-galvanized; Tempered steel sliding arm; Rail, fixed jaws and pressure plate are heat-formed into one piece from cold drawn profiled steel, optimized for high static stress loadings; Heat treated, high-carbon acme threaded screw is tempered and quenched to provide greater loading capacity and longer service life