The Mill-Rose power brush, nutdriver and screwdriver kit contains 1/4” hex shank power fitting and tube cleaning brushes in a range of sizes, plus magnetic power nut drivers and screwdriver bits. Mill-Rose power brushes are ideal for quick cleaning of fittings, tubing, drill holes, as well as deburring metal, plastic and other materials. These brushes are beefed up to withstand the rigors of power drills.