Sliding Arm Bar Clamp, Opening (In. ) 12, Throat Depth (In. ) 5-1/2, Load Capacity (Lb. ) 1200, Nominal Rail Size (In. ) 63/64 x 15/32, Nominal Clamping Pressure 1200, Spindle Dia. (In. ) 0. 70, Pad Type Swivel, Standard, Swivel Type Non-Replaceable, Swivel Pad (In. ) 1-1/2, Screw Size (In. ) 0. 7, Max. Jaw Opening (In. ) 12, Clamp Face (In. ) 1-5/32 x 2-1/4, Bar Thickness (In. ) 63/64, Bar Width (In. ) 15/32, Bar Material Tempered Cold Drawn Forged Steel, Handle Length (In. ) 3-15/16