reidsupply.com sells good-quality clamps. This supplier stocks bar, pipe and L clamps of different designs. It has regular duty, heavy duty and extra heavy duty types clamps in its inventory. It also sells 36″ heavy duty steel clamp and the Clutch Style Bar Clamp. These clamps are made using high carbon steel or hardened steel.
Companies approach them for parts and products because they offer design diagrams for a number of products.