Dremel accessory (473S) detail abrasive brush is designed for detail cleaning and light sanding of contours, details, and hard-to-reach areas and also has built-in polishing compound on the bristles EZ SpeedClic: The Dremel EZ SpeedClic system makes accessory changes fast and easy, simply: Pull - Twist - Release Ideal 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 15,000 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