About this item White Soft Original Drillbrush Power Scrubber can reach into interior corners and wheel spokes. 4-inch diameter flat brush is perfect for carpets, floor mats, Tonneau Covers, and door panels. Tight spot? 2-inch scrub brush has better mobility to access around grill and wheel recesses. All brushes feature rugged steel, quarter-inch, quick-change shafts. Fits drills AND drivers. The Drillbrush Power Scrubber was invented by car wash owner, electrician, and former bodybuilder Anthony LaPolla. Initially created as a way to scrub rims at his car wash without agitating his Carpal Tunnel, his customers fell in love with the idea of a drill-powered brush and wondered how they could get their own. Soon after, Drillbrush was born!