SPRIAL FLUTE STEP DRILL SET BLU-MOL 3pce 4-30 6-20 4-12

FEATURES:
3pce set
Contains: 4-12mm, 4-20mm and 4-30mm
5mm step depths with engraved depth guide
M2 High Speed Steel
CBN fully ground for sharper edge
Split point to reduce walking
Spiral flute for easier swarf removal