PROTEC.class 05102597 Special drill countersink set 6 pcs. 90° 3-cut PKSK6

6-piece, in an impact- and break-proof ABS box, 90° 3 cutting edges, high-quality HSS (DMO5) steel, hardness on the cutting part = 64±1 HRC / hardness on the shaft min. 45 HRC, the CBN-ground conical and deburring countersink offers excellent chip removal, chatter-free operation, a groove-free surface and the best centering properties, for all common industrial materials, e.g. non-ferrous metals, stainless steel sheets, thermoplastic and duroplastic plastics, as well as all common steel sheets