Professional Drill Brush Kit - This drill cleaning brush set contains 4 nylon brushes of different sizes and hardnesses to ensure you have the best cleaning tool for the job and won't scratch your surface (cordless drill not included). Thorough Cleaning - The 4 drill brushes feature 3-point shanks. Quick-release attachments allow you to attach them to a cordless drill or impact driver in seconds for smarter, easier and faster cleaning. SUPERIOR QUALITY MATERIALS - Our drill cleaners are made with high-quality nylon bristles. which fit the brush tightly and prevent the bristles from falling off or causing scratches. Wide Application : The heavy duty cleaning brushes are widely used for indoor and outdoor cleaning, such as: bathrooms, swimming pool tiles, floors, bricks, ceramics, marble, stucco, car interior and exterior cleaning, wheel oil stains on garage floors, exterior walls of the house, fences, railings, etc.