Features1. The high-quality materials and excellent workmanship.2. The electric mill dedicated sandpaper circle, used together with rubber roller3. Nuclear carving, wood, metal, plastic, jade, circuit boards and other production DIY wide range of applications!Install sandpaper circle method--direct sandpaper ring rubber sleeve to the rod, then tighten the screw rubber rods, rubber rod will become drum, hold tight circle sandpaper.Packaged Includes2pc Sanding drum (shank diameter 1/8")100pc 1/4" x 1/2" 120 Sanding grit pads