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