F-Clamp, Heavy Duty, Opening (In. ) 12 in, Throat Depth (In. ) 5 1/2 in, Load Capacity (Lb. ) 2, 660, Nominal Rail Size (In. ) 1-3/16 x 19/32, Nominal Clamping Pressure 2, 660, Spindle Dia. (In. ) 3/4, Pad Type Replaceable, V-Groove, Swivel Type Replaceable, Max. Jaw Opening (In. ) 12 in, Handle Material Drop Forged Steel, Width (In. ) 2 in, For Welding and Fabrication