Constructed of high impact resistant steel. Two operating modes: automatic or manual. Uses 5/8" nylon or polyester rope. Can be used on approved horizontal rope systems. Can be removed and reattached to rope at any point during transverse. Complies with OSHA 1926 and ANSI Z359 standards. Weight: 1.75 lbs. Economically priced. Manufactured by Protecta. Fits 9/16, 5/8 and 3/4 rope.