Genuine Pro-Cut Adapters are to be used with any on-the-vehicle Pro-Cut brake lathe.   These multi-fit adapters have several bolt patterns in each adapter and using THIS ADAPTER GUIDE you will...

Quick Chuck Adapter / Backing Plate / Key Quick Chuck (Fits drums and rotors with holes form 2-1/8" to 3-3/4") Standard Backing Plate (5" diameter) Fits Any Brake Lathe Equipped...