Grit Guard separates the particles from your wash mitt. Grit Guard fits in the bottom of your bucket and cleans your washing utensil to save your paint from swirl marks and scratches. Once dirt settles to the bottom of the bucket, the Grit Guard keeps it there by separating the wash water into four quadrants, so the water cannot be disturbed. When you rub your mitt against Grit Guard in the water, the fluffed up fibers allow for the Grit Guard to extract the dirt, grit, and grime! This products radial designed surface extracts particles such as dirt, grit, and grime from your wash mitt, providing a clean, scratch-free wash mitt every time you go back to the bucket for water. This Grit Guard fits most 3.5, 4, 5, and 6 Gallon Buckets.