Dremel accessories (511S) finishing abrasive buffs are designed for cleaning and light sanding EZ SpeedClic: The Dremel EZ SpeedClic system makes accessory changes fast and easy, simply: Pull - Twist - Release Great for flat and edge sanding on materials such as plastic, soft metal, brass, copper and woods including soft wood, hard wood, laminates, plywood and more Maximum recommended speed 20,000 RPM; shank diameter 3.2 mm; working diameter 25.0 mm Fits with all Dremel Multi-/Rotary tools or other 3,2mm shank size multi- / rotary tools, Weight: 0.0220462262 pounds, Manufacturer: Dremel