Description Manufacturer part #: 15.40 Technical Description Features American Metric Name Single Sheave size 1 3/4 in 45 mm Max line size 3/8 in 10 mm Breaking Load 661 lb 300 kg Hole Spacing 1 1/2 in - 2 3/64 in 38-52 mm Hole Diameter 3/16 in 5 mm