Comprehensive Set for Versatile Use: This 12-piece set includes 4pcs 0.79-inch pen brushes, 4 pcs 2-inch wheel brushes, and 3 pcs 2-inch cup brushes, designed to tackle a variety of surfaces from large areas to tight corners, ensuring effective cleaning and grinding. Built to Last: Constructed from premium carbon steel, each brush in this set is tightly bound to prevent bristle and bending, ensuring durability and for all your maintenance needs. Stable and Secure Operation: Equipped with a reliable 1/4-inch hex shank, these brushes maintain a firm grip in your drill, preventing slippage and ensuring consistent performance throughout their use. High Compatibility and Performance: Suitable for most electric drills and pneumatic tools, these brushes can operate at speeds up to 4500 RPM, making them ideal for removing rust, stripping paint, and smoothing out surfaces. Efficient Cleaning Solution: Quickly remove rust, paint, weld spatter, and oxidation with these drill wire brush attachments. Color:As Shown Material:Steel Wire Package Contents: 12 * hexagonal handle wire brushes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.