Description Manufacturer part #: 15.24 Technical Description Features American Metric Name Single Sheave size 1 1/2 in 38 mm Max line size 5/16 in 8 mm Breaking Load 1,102 lb 500 kg Base 1 in x 3 5/16 in 25 mm x 84 mm Hole Diameter 5/32 in 4 mm Hole Spacing 2 7/8 in 73 mm