Features The WESTWARD® locking chain clamp holds and locks around any size or shape. Won't slip or crush thin-walled pipe. Adjusts in either direction. Nickel-plated, heat-treated alloy steel clamp has micro-adjustment screw mechanism. Max. Opening / 3 3/8 in Throat Depth / 1 1/4 in Clamping Force / Not Rated Nominal Clamp Size / 9 in Number of Pieces / 1 Swivel Pad / No Tether Style / Tether Capable Overall Clamp Length / 8 3/4 in Finish / Nickel Plated Material / Steel Locking Mechanism / Release Lever Screw Mechanism / Adjusts Clamping Pressure Standards / ASME B107.36-2002