C-Clamp, 400 Series, Size (In.) 4-1/4, Throat Depth (In.) 3-1/4, Min. Proof Test (Lb.) 6200, Load Capacity (Lb.) 6200, Clamp Type Drop Forged, Black Oxide Spindles, Smooth Pad, Body Material Steel, Color Black, Flat Anvil, Powder Coat Finish, Forged Steel Frames, Steel Screws, Steel Swivel Pad C-ClampsWiltonDrop-Forged, Heavy-DutyFine thread provides added clamping force. Perma-Pad swivels.