Clutch Style Bar Clamp, Opening (In.) 36, Throat Depth (In.) 2-1/2, Load Capacity (Lb.) 600, Nominal Rail Size (In.) 3/4 x 1/4, Nominal Clamping Pressure 600, Spindle Dia. (In.) 0.40, Pad Type Non-Marring, Swivel on Anvil Surface, Swivel Type Replaceable, Swivel Pad (In.) 1, Screw Size (In.) 0.4, Max. Jaw Opening (In.) 36, Clamp Face (In.) 1-1/8 x 1-5/8, Bar Thickness (In.) 3/4, Bar Width (In.) 1/4, Bar Material Nickel-Plated, Drawn Steel Serrated Rail, Handle Length (In.) 3-1/2 From the Manufacturer New economical Bessey F-Style clutch bar clamps come with cast heads with powder- coated finish to resist corrosion and chipping. Bessey provides a zinc finished rail with a two piece clutch plate system for opening and closing the lower movable jaw. The Bessey clutch clamps are also provided with protective pads on both the top and bottom jaws and come with a comfortable wooden handle.