Vanguard Steel Self Locking Hook, 5/16"", Eye Sling Hook w/Locking Latch, 5700 lbs. ( 2.85 tons), Alloy Steel, Grade 100 (3958 00163)

Self Locking HookThe latch on this hook automatically closes when pulling force is appliedMeets or exceeds ASTM A-952-96 standardMeets EN1677 standard (20,000 cycle fatigue test)Permanently embossed with VDG, size, model number and trace codeProof tested to 2.5 times the Working Load Limit (WLL)Design factor 4:1Packaging is either recyclable, biodegradable, reduced, and/or features recycled content