Attaches to 3" Pneumatic Mini Rotary Polisher Cleans carpet, fabrics, upholstery and seats Lifts and extract dirt safely and easily Stiff bristles for intense scrubbing Durable 100% polypropylene 5/16" x 24 Thread This 3. 5" Dia. direct mount rotary brush is a light duty brush that cleans carpet, upholstery and seats. This brush is meant for rigorous scrubbing of durable carpets. The high speed rotation of NANOSKIN 3" Pneumatic Mini Rotary Polisher combined with the highest quality premium light duty brush lifts and easily extracts spots from fabrics, upholstery and carpet. This brush can also be used on tile and grout in bathrooms and showers. Save time and energy with this medium duty carpet brush.