ASSORTED POLISHING KIT TO MEET DIFFERENT NEEDS: Includes a 12-piece set of brass wire drill attachments. From light to medium work, the cup brushes, wheels and end brushes are to accommodate the shape of your working surface HEAVY DUTY AND VERSATILITY: These wire wheel brushes are solid brass. Do a good job removing rust, paint, burrs, and corrosion from wide flat surfaces, small areas, corners, screw and bolt heads. Bulk quantity for any job, won't let you down 1/4" SHANK FITS ALL ELECTRIC CORDLESS DRILLS AND GRINDERS: Permanently attached 1/4" shank with 4500 R.P.M MAX. This wire wheel brushes kit is essential in any metal fabrication shop or garage COMPLETE SET CONTENTS: 4-pack wire wheel brushes (1.5", 1.97", 2.95", 3.94"), 2-pack wire cup brushes (1.97", 2.95"), 6-pack wire end brushes (0.39", 0.63", 0.63", 0.79", 0.98", 1.18"). Enough for your daily use and replacement SOLID BRASS CONSTRUCTION: Made with durable brass wire material that provides long-lasting performance for various surface preparation and cleaning applications in workshops and garages