Sliding Arm Bar Clamp, Opening (In.) 8 in, Throat Depth (In.) 4 in, Load Capacity (Lb.) 880 lb, Nominal Rail Size (In.) 49/64 x 3/8, Nominal Clamping Pressure 880, Spindle Dia. (In.) 0.625, Pad Type Standard, Swivel, Swivel Type Non-Replaceable, Swivel Pad (In.) 1-1/4, Screw Size (In.) 0.625, Max. Jaw Opening (In.) 8 in, Clamp Face (In.) 15-16 x 1-15/16, Bar Thickness (In.) 49/64 in, Bar Width (In.) 3/8 in, Bar Material Tempered Cold Drawn Forged Steel, Handle Length (In.) 3 3/8 in