Hosco Japan H-TLDB27899 step drill for Rotomatic type tuners, 9.9mm and 7.8mm diameter

Step drill bit for installing Rotomatic type tuners.

- Shank: 9.9mm diameter
- 7.8mm and 9.9mm diameter holes are drilled at the same time

All of our step drill bits are made of HSS (high speed steel) and promise a fine job for making tuner holes. The drill bit blade is especially designed to drill hard woods like maple.