Description Double Fixed with Cam and Becket Conventional Sailboat Block Ball bearing design with long lasting characteristics. Technical Description Features Metric American Working Load 600 lb 272.155 kg Breaking Load 2000 lb 907.18 kg Length 4.33 in 110 mm Width 1.73 in 44 mm Maximum Rope Line 0.39 in 10 mm Sheave diameter 1.54 in 39 mm Weight 0.26 lb 119 g