These brushes should cut your cleaning and scrubbing time in half or more compared to the rigorous effort involved in hand scrubbing. Designed for cleaning bathtub, grout, bathroom surface, floor, tile, shower, toilet and carpet etc. PROFESSIONAL CLEANING: Drill brushes are perfect for power scrubbing Grout, Floor, Kitchen,Bathroom Surfaces, Shower, Tub, Tile, Floor Brick & Marble, Ceramic Patio Furniture, Fiberglass, Car wheel, Wall, Stove top, Sink, Corners, boat and More. COMPATIBILITY - FITS 99% OF ALL DRILLS: Simple 1/4 inch steel shaft quick connect slides right into your drill then simply tighten. They will not damage your drill and are safe to use.