【Cost-Efficient 21 Pcs Kit of Wire Brush for Drill】Double Elite wire brush for drill kit includes 21 pcs wire brushes for home projects use. There are 15 pcs of wire wheels for drill, 3 wire cup brushes for drill, and 3 wire end brushes. The wire wheel for drill kit is much cost-efficient than buying from a local tool store. | 【More Durable with Upgraded Wires】The drill wire brushes are well-filled with crimped, untempered 0.012 Inch carbon steel wires. We specially upgrade the number and thickness of the bristles（1-1.5times) to ensure that the wire will not quickly fall off during intensive operation. All wires are rigidly secured to a safety-designed cup-shaped metal holder for added durability. | 【Securer with 1/4” Hex Shank Design】The wire brush drill attachments are easy to use, simply attaching to a drill then use. The 1/4-inch (6.35 mm) hex shank makes them easier for fixing on a drill and won’t fall off easily like round shank ones. Meanwhile, the hex shank covers wider drills including a regular power drill as well as a pneumatic air drill, etc. | 【3 Different Types for Different Surfaces】The wire brush for drill set includes 3 types of drill wire brushes in 6 sizes, so to cover your most need in a home project, wide space or narrow one. The 5 wire wheels for drill cover diameters from 1-1/2 inches (38 mm) to 3 inches (75 mm), best for inner / side de-rusting job. The 1 wire cup brush with φ2 inches (50 mm) is best for flat surface job. While the small 1 wire end brush with φ 3/4 inch (19 mm) is best for narrow holes and confined areas. | 【Wide Application】The drill wire brush set cover wide tasks, such as removing rust / scale / paint, polishing wood crafts, finishing weld seams, and other light to medium-duty surface treatment of metals. For safety, before the work DO wear protective gear, such as goggles, mask, protective gloves and protective clothing.