The S-1326 hook is a positioning device and is not intended to rotate under load. For swivel hook designed to rotate under load, use the S-13326. S-13326 Swivel Hook utilizes anti-friction bearing design which allows hook to rotate freely under load. Rated for both wire rope and for use with Grade 80/100 chain. Forged alloy steel, Quenched & Tempered. Individually Proof Tested at 2-1/2 times the chain Working Load Limit with certification. Recessed trigger design is flush with the hook body, protecting the trigger from potential damage. Easy to operate with enlarged thumb access. Positive lock latch is self-locking when hook is loaded. Trigger repair kit available (S-4316). Consists of spring, roll pin, and trigger. Fatigue rated to 20,000 cycles at 1-1/2 times the Working Load Limit. The SHUR-LOC Hook, if properly installed and locked, can be used for personnel lifting applications and meets the intent of OSHA Rule 1926.1431(g)(1)(i)(A) and 1926.1501(g)(4)(iv)(B). Suitable for positioning before lifting.