The Centering Mirror is an ingenious, simple solution to an old problem: drilling truly square to the surface without a drill press. Sight your bit against its reflection, and when bit and image form one straight line, you are at 90 degrees. Born from practical shop experience, and it never needs batteries.
Specifications:
- Material: plexiglass mirror
- Hole: 1-3/8-in diameter, fits a range of bit sizes
- Use: sight the bit against its reflection for a true 90-degree hole
- Made in: Woolwich, Maine by Shelter Institute