Our 1/4 inch round shank wire brush for drill rust removal are compatible with most die grinder, electric drills, rotary tools. The maximum speed of the wire brush set is 4500 rpm. Please note that the speed of extended wire brush and long shank bore brush must not exceed 2000 rpm and the hole brushes can only be used in push and pull set and brass wire brush for drill rust removal efficiently remove paint and heavy , edges and burrs, perform edge finishing, and undertake deep cleaning tasks. The wire wheel is made of 2 materials, high hardness carbon steel wire and brass, which are firmly fastened and not easy to loosen through professional crimping technology. High hardness carbon steel has high durability for . Solid brass material, soft texture without scratches. The 8 pcs carbon steel and brass wire brush drill attachments set includes: 2pcs 2 inch (50mm) wire wheel brush, 2pcs 1 inch (25mm) wire brush, 2pcs 0.63 inch (16mm) extended wire brush, 2pcs 0.6 inch (15mm) bore brush. With a box for storage. The wire brush drill attachments have different material, 4 shapes to meet different needs Whether it's rust removal, paint stripping, coating scraping, weld grinding, or cleaning pipes and internal bores, you can select the appropriate shape and size from our kit for effortless handling, high efficiency, and time savings!, Weight: 0.1984160358 pounds, Manufacturer: UieoKakeh