MAL-GRIT SCRUB rotary floor machine brushes offer solutions to a wide range of cleaning situations. Silicone carbide impregnated nylon bristles are self-replenishing as brush wears, offering unmatched value that outlasts floor pads over 100 to 1! That translates directly into time and cost savings. Featuring our water and chemical resistant TUFF-BLOCK for maximum life expectancy. All Grit Brushes must be run in a wet environment. The most aggressive grit available. This heavy gauge nylon with larger grit is used for stripping heavily soiled floors, such as concrete floors, in an industrial setting. Trim Length: 1 1/2". BEST USED FOR: Stripping: Terrazzo, Heavily Soiled Concrete. 1 each.