Dremel 3/8" 120 Grit Flapwheel is used for grinding and polishing flat or contoured surfaces on metal, wood, rubber, or plastic. As the flaps wear down, new abrasive is exposed, ensuring a consistent finish. It has a 1/8" arbor size and includes a 1/8" mandrel for easy attachment to your Dremel rotary tool. Flapwheels are most effective as a finishing sander after heavier surface sanding and material removal is completed.