The Sunbrite family of surface conditioning discs are a top choice for metalworking for cleaning, finishing, blending and deburring applications. Combines with the Quick "1/2 turn-on, 1/2 turn-off" disc fastening system. Measures 2 inches (50.8mm) diameter. Maximum operating speed: 25, 000 RPM. Fits 3M Roloc pads 05539. For best results use with Sun gold # 99081 pad.