1/2" To 7/8" L095 Flexible 3-Piece L-Jaw Coupling Coupler Set Rubber, 7/8 Size information:1/2" bore with 1/8"X1/16" keyway,7/8" bore with 3/16"X3/32" keyway,and 2 set screw on one coupling half The L-coupling is made of cast iron HT250 and is more robust than the powder metallurgy products on the market The surface of the coupling is blackened, and it is corrosion-resistant and rust-proof coupling are widely used in industrial and agricultural equipment, such as wood splitters, air compressors, pumps, blowers, conveyor belts, motors and other transmission devices. Interchangeable for Lovejoy, Martin, and other L-jaw couplers Package Contents:two coupling halves,1 NBR rubber,4 set screw,1 x Wrench