Two large sheaves with a becket (straight center plate) in between that has a low clip-in point for block and tackle systems in rescue operations. Rotating side plates permit easy rigging. Working Load: 4 kN x 2 = 8 kN, 900 LBF x 2 = 1800 LBF. Breaking Load: 16 kN x 2 = 32 kN, 3600 LBF x 2 = 7200 LBF. Inner Sheave Diameter: 50 mm, 2.0 in. Max Rope Diameter: 15 mm. Weight: 430 g, 15.2 oz.