153564 Features: -4" Premium Resin Polishing Disc Kit.-The Hook and Loop backing allows for fast disc changes.-Item # 153564.-Max RPM: 3700. Color/Finish: -Designed to achieve a scratch-free highly polished finish on all straight or contoured granite and marble edges.-Disc backs are color-coded for easy grit size identification.-White buff pad is used for final buff on light colored stone to prevent marking material. Dimensions: -Weight: 1 lbs.