1/4 HP 1725 RPM electric motor. This is the most versatile tool in my shop. With it I can clean metal, remove rust, polish, de-burr, remove flux and more. The idea is: 1) to buy a used motor. 2) mount the motor in a secure location. 3) add an arbor or shaft extender. 4) choose from a wide variety of wire brushes, buffing wheels and flap wheels. You can buy a shaft extender at caswellplating.com or amazon,com.