Forney 4 In. Fine Drill-Mounted Wire Wheel is a stem-mounted wire wheel brush designed for easy access into narrow holes and confined areas. Its crimped style is for light to medium duty applications, efficiently removing rust, scale, and paint from hard-to-reach spots. This wire wheel is compatible with any 1/4" diameter electric power drill or 01990 pneumatic (air) drill and operates at a maximum speed of 6000 rpm (revolutions per minute). The fine wire style ensures a delicate yet effective cleaning performance, making it an essential tool for detailed surface preparation and maintenance tasks. Model Number: 72740