Description Manufacturer part #: 15.23 Technical Description Features American Metric Name Single Sheave size 2 3/16 in 55 mm Max line size 1/4 in 6 mm Breaking Load 1,763 lb 800 kg Base 2 13/32 in x 2 23/64 in 61 mm x 60 mm Hole Diameter 3/16 in 5 mm Hole Spacing 1 47/64 in 44 mm