Table Mount Clamp, Compatible Table Hole Size 5/8 in, Compatible With Clamping Squares, Right Angle Brackets, Riser Blocks, Features Crank Handle to Pre-Set the Clamp Opening, Rear Crank Handle Allows Clamp Pressure Adjustment While the Clamp is in Locked Position, Holding Capacity 250 lb, Maximum Jaw Opening 4 in, Overall Depth 3.4 in, Overall Height 12 in, Overall Width 4 in, Product Type Inserta Pliers, Throat Depth 3 3/8 in, Work Surface Pattern 5/8 in Hole Every 2 in