If you are looking for a quality C clamp, the Kant-Twist K025TDW Cantilever Clamp is ideal. The body and anvil are made of steel, which means it can handle high amounts of pressure. This 1-13/16" D throat cantilever clamp has a max opening of 2 1/2 in. It features zinc plated steel body and copper plated steel anvil finish for enhanced durability. It has a 700 lb clamping pressure to help ensure strong hold. If you want a heavy duty cantilever clamp that will meet your demands, the Kant Twist K025TDW is just what you need.