Special step drill for screw holes, M 8/10/12/16/20
Special step drill for screw hole, the HSS step drill for burr-free drilling of through holes for screw hole pulling screws M8(3/8")-M10(7/16")-M12-M16-3/4"-M20 in material up to 4 mm thick. Suitable for use in hand-held and pedestal drilling machines, a total of 9 drilling steps, mounting shank (10 mm Ø) with 3 driving surfaces prevents slipping in the drill chuck. PU:1
