Create deep, clean holes quickly and easily in soft or hard wood. Lead screw pulls the bit into the work eliminating extra pressure and strain. Both sets can be used with a hand or electric drill.

Includes:
- 3/8" X 230mm
- 15/32" X 230mm
- 9/16" X 230mm
- 5/8" X 230mm
- 11/16" X 230mm
- 25/32" X 230mm