Lightweight Prusik pulley with moving side plates. Designed for hauling and pulley systems. Very lightweight (aluminum side plates and sheave). Very efficient sheave mounted on sealed ball bearings. Very compact, flat shape. Certification: CE / UIAA Technical specifications: Efficiency: 91 % Breaking strength: 2 x 8.5 kN = 17 kN Working load: 2 x 2 kN = 4 kN For use with ropes of maximum diameter 11 mm Weight: 80 gm.