This 2-user, galvanized steel vertical safety system (vertical lifeline) meets the new ANSI Z359.16 standard, along with OSHA 1910.140 and 1926.502, when used with the Lad-Saf X3 Detachable Cable Sleeve (6160054) and Lad-Saf X2 Detachable Cable Sleeve (6160030) and is ideal for billboards and ladders. The Climbing Extension extends 4’ above the top attachment point.