Sonic Scrub Mal-Grit Scrub is a lightweight, deep cleaning rectangular brush design for the oscillating floor machine industry. This innovative, patent-pending design is tufted with polypropylene and durable grit nylon filament. The Mal-Grit Scrub is ideal for daily scrubbing and maintenance for any oscillating floor machine. Featuring nylon grit filament, this brush is designed to remove worn finishes, soils, scuffs, and spills and prepare surfaces for re-coating. Remove the toughest dirt and scuff marks from the heaviest soiled floors!