Item #: 32966947Brand: Standard AbrasivesModel #: 598526 Features and Benefits Type R attachment systems feature roll-on/roll-off style fasteners (External Thread). They are interchangeable with Roloc, TR and Type III Styles. Coated abrasives can be used for most applications, from grinding to polishing. They consist of a thin layer of abrasive adhered to fiber, paper, cloth or rubber. Coated discs are normally used on angle grinders. More durable than aluminum oxide, zirconia-alumina is best for medium- to heavy-material removal. The material grains constantly fracture to produce new sharp edges. Commonly used on carbon steels, aerospace alloys, nickel alloys, aluminum, cast iron, forgings and some stainless steels. Product Specifications Disc Diameter (Inch) 3 Attaching System Type R Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Medium Grit 80 Backing Material Cloth Maximum RPM 18000 Backing Weight Y Disc Color Green Button Color White Quick Change Compatibility Lockit