Forney 4 In. Coarse Drill-Mounted Wire Wheel is a stem-mounted wire wheel brush designed to provide easy access into narrow holes and confined spaces. Its crimped style is for light to medium duty applications, effectively removing rust, scale, and paint from hard-to-reach areas. This wire wheel is compatible with any 1/4" diameter electric power drill or 01990 pneumatic (air) drill, operating at a maximum speed of 6000 rpm. The 4-inch diameter and coarse wire style make it a reliable choice for tough cleaning tasks, packaged conveniently in a clamshell for single use. Model Number: 72739