9. Matters needing attention: the chamfer needs to be operated with a bench drill. Do not use a hand electric drill. Continuous cooling should be performed during use.
Specification:
- 2-5 (2-5mm range hole, shank 6mm, head diameter 9.7mm)
- 5-10 (5-10mm range hole, 8mm shank, 14mm head diameter)
- 10-15 (10-15mm range hole, shank 10mm, head diameter 21mm)
- 15-20 (15-20mm range hole, 12mm shank, 28mm head diameter)