About this item 4 Different Sizes and Medium Stiffness Made with ultra durable high quality PP (polypropylene), each bristle is stiff enough. Professional cleaning brush for tiles, grout, floor, car, carpet, bathroom, shower, exc. Shapes brushes for cleaning, These nylon bristles will not scratch, Durable nylon bristles, Drill not included Drill Brushes 360 * Save Time Clean Faster - Clean Brushes That Attach to Any Cordless Drill - Transform your ordinary one Drill or impact wrench into a powerful cleaning tool in seconds. Finish stubborn cleaning jobs faster and with a deeper clean. Clean grim, scum, stains, water stains and years of nasty build-up in record time. FITS% 99 All Drill BitsEasy 1\/4 inch steel shaft quick connect slips right into your drill bit then just tighten. NoteFor best results, always wash the surface with water and then spray or apply detergent or soap such as fabric cleaning or instantaneous stain extractor.