step drill set 4-12 4-20 6-30 mm, HSS-G, spiral flute

step drill set 3pcs. HSS-G spiral flute

PROFI quality

Step drill set in stable metal case. Consisting of:

1 step drill - 4-12 mm - 9 steps - 1mm increasing
1 step drill - 4-20 mm - 9 steps - 2mm increasing
1 step drill - 4-30 mm - 14 steps - 2mm increasing

spiral flute

with cylindrical shank

The cutting tools are made of polished high-performance high-speed steel.