Extreme Cleaning Disc for Heavy-Duty Use - This aggressive cleaning disc works great for removing paint and corrosion from body panels. Use with the (13064) Mandrel in your electric or pneumatic drill spinning at up to 5000 rpm to quickly clean difficult to strip areas. Approximate 9/16" width fits well into channels. Fresh abrasive is constantly exposed in use. Leaves a finish similar to that of 50 grit abrasive paper.