Ultra-Safe's US-5000C Rope Grab is made of durable non-corrosive stainless steel, brass & bronze. It's 100% inspected for function, construction and material integrity and is designed to meet the performance requirements of ANSI Z359.1, OSHA 1926 (maximum 3 ft (0.9m) shock absorbing lanyard) and CSA Z259.2 (a permanently attached 3 ft (0.6m) lanyard) when used with Polysteel / Poly Pro Blend or be positioned not to exceed 6’ free fall. 5/8″ (16mm) Rope and installed and maintained properly.