Drop forged - heat treated carbon steel hooks. Clevis pin is carbon steel - heat treated, cotter keys are mild steel. Hooks are designed with a full wide throat to allow for fast and easy connections. Chain is passed through throat of slip hook to form a chain loop used to drag, pull or tow. The loop will tighten when slack in chain is taken up. WARNING: NOT BE USED FOR OVERHEAD LIFTING. DO NOT EXCEED WORK LOAD LIMIT.