Quick Detachable Bushing, Series SDS, Bore Dia. 1-7/16 In., Bolt Circle Dia. 2.6875 In., Bolt Size 1/4-20x1-3/8 In., Length 1.3125 In., 3/4 In Per Foot On Diameter Taper, Steel, Iron Material, SAE Grade 5, For Sheaves, Sprockets, Pulleys, Includes Cap Screws