LOK-A-LOY® 10 Alloy connecting link. Suitable for use with both grade 80 and 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. 25% stronger than grade 80. Meets ASTM A-952-02 standards for grade 100 chain fittings. Forged alloy steel, quenched and tempered. Sizes 9/32 through 1 inch are fatigue rated.