PROTEC.class 05102211 Special drill step drill HSS SP size 1, 4-20 mm PSTB

High-quality HSS steel (DMO5), brightly ground, point thinning: cross grinding in accordance with DIN 1412C, tip angle: 118°, step angle: 90°, surface: bright, 3-point flat shank for perfect hold of the tools in the drill chuck