With a radial grid that sits in the bottom of the wash bucket, the grid acts as a washboard removing abrasive grit from your wash mitt. Featuring a four quadrant isolation chamber, dirt and debris settles to the bottom reducing contamination of your wash mitt and car wash solution. Your wash solution remains cleaner for longer and your paint is protected from swirl inducing dirt and grit. For best results, use with Meguiar's Ultimate Wash & Wax and the Meguiar's Lambswool wash mitt.