The Performance Tool 1/4" Shank Cup Brush Set is a versatile tool that is compatible with any power drill, making it perfect for a variety of tasks at home or in the shop. Made with high-quality materials, this Shank is built to withstand heavy usage and provide long-lasting durability. This set includes one 1" cup brush and two 3" cup brushes, giving you a range of brush sizes for different cleaning tasks. The cup brushes are designed for efficient and effective cleaning of various surfaces, including metal, wood, and plastics. Simply attach the Shank to your power drill and attach the cup brush of your choice - no complicated setup required. This set is a cost-effective and versatile tool that every DIY enthusiast should have in their toolbox.