This genuine OEM sourced item is supplied directly from the original equipment manufacturer for use with Jet and Wilton belt and disk sanders. It is an identical replacement for a missing or a worn garnet disk that was included with a new unit. Please make sure to refer to the appropriate diagrams of your model for the correct location and application of this component. Keep in mind this high-quality garnet disk is made of durable materials and is sold individually. For Use With: Jet 4210 (5511717) Belt and Disc Sander J-4210 (414550) Disc/Belt Sander