POWERTEC 20304 Push/Pull Quick-Release Toggle Clamp, 300 lbs Capacity, 302F A rock-solid grip to install on jigs, tool fixtures, or movable bases Cold-rolled carbon Steel with Zinc plated coating for corrosion resistance Ideal when work piece must be held by horizontal clamping action 300 lb holding capacity; Complete with adjustable 5/16 -18 bolt Unique push/pull action allows you to hold workpiece in a vertical position