Subland twist drills with straight shank for drilling clearance holes – accuracy class “medium” – according to ISO 273, with the simultaneous screw-head counterboring (90°) of the shapes A and B (accuracy class “medium”) according to DIN 74, Part 1.
Centre-drills for the production of centre holes according to DIN 332 sheet 1, form A and form R.
5% cobalt alloyed NC-drills for precise and fast drilling-work, for centering and chamfering of center-holes.