Mounted Flap Wheel 3" x 1" x 1/4-60 Grit Our Flap Wheels are designed for light finishing work,deburring and flash removal. The flap design allow the wheels to contour around the work piece to smooth the surface. As the flaps wears away, new abrasive grain is exposed allowing the wheel to continue to cut. Ideal for general purpose cleaning,deburring,polishing and blending.Excellent on wood,stainless steel,steel,aluminum,plastic,fibeglass,etc. Machine- Regular Mounted Flap Wheels are generally 3 or less in diameter are used with die grinders,rotary tools,and hand drills. Max RPM- 20000 Aluminum Oxide