This specially shaped buffing wheel is excellent for reaching those tight spots that you've always had to do by hand. Now you can use a drill and get the job done quicker and easier. Pre-mounted on a 1/4" shank to slip easily into your drill: pneumatic, power, or electric. Great for wheels, classic cars, motorcycles, engines, boats and much more. Tapers approximately from 2-1/2" down to 1".