Dart
DART Straight Flute Step Drills 4-39mm
13 Steps (4, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39mm)
Precision engineered steel bits with straight flute tapered cutting edges allowing for deburring or chamfering of the hole drilled.
HSS ground...
SSTF134-39