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. Wire wheel brush with 2", 2.56", 3"(50/ 65/ 75mm). Wire end brush with 0.78", 1"(20/ 25mm). Wire cup brush with 2", 2.56"(50/ 65mm). Extended wire brush with 0.63"(16mm). The diameter of round wire bore brushes are 0.39", 0.6", 1"(10/ 15/ 25mm). The extended brush and hole brush both measure 6"(150mm) in length. Drill wire brush set includes: 3pcs wire wheel brush, 2pcs wire cup brush for drill, 4pcs wire brush, 1pc extended wire brush, 3pcs bore brush. With a box for storage. The wire wheel drill wire brush is crafted from premium high-hardness carbon steel wire, professionally crimped for secure fastening that resists loosening. The construction for . 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! The extended handle allows for polishing., Weight: 0.440924524 Pounds, Manufacturer: Gishbjka