Crosby A1337 1-1/4in (32MM) Lok-A-Loy 10 Grade 100 Alloy Connecting Link - Suitable for use with both Grade 80 and Grade 100 chain. Individually Proof Tested at 2-1/2 times Working Load Limit with certification. Locking system that provides for simple assembly and disassembly - no special tools needed. Meets ASTM A-952 standards for Grade 100 chain fittings. Forged alloy steel Quenched & Tempered. Sizes 9/32 through 1 inch are fatigue rated.