PanaVise Bench Clamp.
Can be used with standard or heavy duty base.
Clamps to anything up to 3.4375 inches thick.
Throat depth from center of clamping screw is 2.3125 inches.
Pre-drilled and tapped with three 1/4-20 holes evenly spaced on a 4.3125 inch bolt circle.
Includes four non-marring anti-skid neoprene pads for additional anti-slip characteristics without excessive tightening of the clamping screw.
Finger grip for added convenience.
Weight is 2.4 lbs.