Version:
Drill and counterbore each with its own chip flutes and guide chamfers. This means it can be reground many times.
Application:
For through holes for screws to DIN-ISO 273 and countersinks to DIN 74, sheet 1 form A, fine version.
For countersunk screws to ISO 2009, 2010, 7046, 7047 (DIN 963, 964, 965 and 966).