Material : M35 Cobalt High Speed Steel Specifically designed to stay cool throughout the cut. Also Available from dia 12-150mm by 0.1mm rising. With Supper Fast Feed rates and smooth hole in hard materials The cutting edges can be re-sharpened. UNIVERSAL SHANK, Can be Used in- Any brands of magnetic drilling machines, e.g. BDS, NITTO Hougen, Jancy, Fein, Alfa, Rotabroach.