Heavy, cold-forged steel channel beams cover and protect the screw and add to its strength. The vise has 5' wide jaws with 5' maximum opening, 3' throat depth, replaceable serrated jaw inserts, and a pair of removable pipe jaws with 1/2 to 1-1/2' opening capacity. Other useful features include a 360 degree swivel base with dual lock nuts, a ground and polished anvil, a large forming horn, and orange powder-coat finish