High Quality Brush Heads?The Brush Heads Are Made Of High Quality Soft Material To Ensure The Superior Durability, Even For Long Lasting Use For Deep Cleaning. Perfect For Cleaning Bathtubs, Showers, Tiles, Floors, Glass, Swimming Pools, Car Wheels, Etc., Offering A Wide Range Of Cleaning Options. Can Be Use With 21V Electric Spin Scrubber For Efficient And Fast Deep Clean. Really Gets Into The Nooks And Crannies And Leaves Everything Spotless | | A Godsend For Deep Cleaning?4 Replaceable Brush Heads For Targeted Precision Cleaning. The Big Flat Brush Is Used To Clean Large Areas Such As Floors; The Dome Brush Is Perfect For Cleaning Bathtubs Or Sinks; The Corner Brush Is Great For Cleaning Corners And Tight Spots, Even Wheel Crevices; And The Small Flat Brush Is Perfect For Cleaning Kitchen Stovetops Or Bathroom Countertops. Each Brush Reaches Deep Into Corners To Effectively Remove Cement Paste And Stains | | Easy To Use?The Brush Heads Are Very Easy To Install And Use.