Clamp, F-Style Sliding Arm, Opening (In. ) 4, Throat Depth (In. ) 2, Nominal Rail Size (In. ) 19/32 x 3/16, Nominal Clamping Pressure 330 lb. , Spindle Dia. (In. ) 0. 393, Pad Type Replaceable, Swivel, Non-Marring, Swivel Type Standard, Swivel Pad (In. ) 7/8, Screw Size (In. ) 25/64, Max. Jaw Opening (In. ) 4, Clamp Face (In. ) 7/8, Bar Width (In. ) 19/32, Bar Material Zinc Die Cast, Handle Length (In. ) 3, Handle Material Wood, Width (In. ) 3-1/4