Cyclo (76-830x2-2PK) Shampoo Brush with Aqua Soft Bristles, (Pack of 2) Aqua soft carpet brush is recommended for fine carpets, durable carpets, auto and RV carpets and upholstery This Aqua brush features medium crimped bristles for a gentle yet thorough cleaning. Each brush kneads and vibrates loose any soil or debris and is perfect for most carpets Use genuine cyclo brushes to bring life back into worn carpet pile, to safely remove stains from rugs and headliners, or to clean-up upholstery 5/16-24 inch male thread means this brush useable on other single-head orbital machines such as Porter-Cable 7424XP. Secure metal stud mounting rather than hook and loop methods found on other machine brushes