Description Manufacturer part #: 15.17 Technical Description Features American Metric Name Single Sheave size 1 5/16 in 34 mm Max line size 3/16 in 5 mm Breaking Load 1,543 lb 700 kg Base 1 55/64 in x 1 57/64 in 47 mm x 48 mm Hole Diameter 3/16 in 5 mm Hole Spacing 1 1/4 32 mm