Features and Benefits:•3" Pad Holder•Use with air and electric tools to clean and prep surfaces.•Discs install and remove easily with a quick twisting action.•Flexible, flanged rubber backer pad connects to 1/4" steel shaft.Cleans machinery, engines, parts, floors and more. Use with detergent, solvent, kerosene or water. Adjusting control regulates amount of cleaning agent to be mixed with compressed air. Clear siphon tubing is 7 feet long with filter on end. Gun is 17" long to clean hard to reach places. Weights only 12 ounces. Air consumption is 5 CFM @ 90 PSI. Maximum 90 PSI. Recommended operation pressure is 70-90 PSI.