Tool SteelHigh-quality burs in various forms by Busch. Subgroups Bearing cutters 70° Bearing cutters 90° Wheel steel cutters PavéCut 447 Concave cutters 411T Cone steel cutters Cone steel cutters Round steel cutters Round steel cutters Pointed steel cutters Stone setting burs wax burs cylindrical burs Cylinder steel cutters Cylinder steel cutters Cylinder diam. cutters