Description Manufacturer part #: 12.72 Technical Description Features American Metric Name Double Sheave size 2 1/4 in 57 mm Max line size 7/16 in 12 mm Overall Height 4 1/4 in 109 mm Weight .4.3 ounces 122 g Breaking Load 3,306 lb 1,500 kg Max. Working Load 1,234 lb 560 kg