Clevis hook with alloy steel, quenched and tempered. Individually proof tested at 2-1/2 times the working load limit with certification. Pin locking requires no special tools. The use of A-338 clevis grab hook will result in a 20% reduction in chain capacity. When used to hook back to chain leg to form a choker, the angle of the choke must be 120° or greater. When used as a chain shortener, minimize twist of chain and ensure chain is fully engaged in hook.