Working Load Limit : 4,500 lbs, Breaking Strength : 18,000 lbs Material : Grade 80 Alloy Steel, Drop Forged,Painted Yellow Inspect prior to usage, never exceed working load limit Meets strength and performance requirements of ASME B30.32 Avoid shock loads, 4:1 Safety Factor 5/16" Grade 80 Clevis Self Locking Hook Main Features : Working Load Limit : 4,500 lbs Breaking Strength : 18,000 lbs Material : Grade 80 steel. Drop Forged. Finish : Painted Yellow With Pin and retaining pin. Meets strength and performance requirements of ASME B30.26 4:1 Safety Factor Inspect prior to usage Never exceed working load limit Avoid shock loads