Drive hub used for disc rotor or sprocket, bored 1 1/4", (31.75mm) 10mm keyway, 120mm outside diameter, 8mm thick flange, 86mm location diameter for disc or sprocket, machined from 1045 billet steel. No hole pattern or locking holes drilled so you can drill your own to suit your disc or sprocket.

Part no. MHU-KEY