DIY Frequently Asked Questions / Twist Drill Bit
-
DIY Frequently Asked Questions / Twist Drill Bit')">
Used in both wood and unhardened metals to make clearance holes for bolts, screws, etc., and to make holes for tapping. - Bits marked HS (high speed) or HSS (high speed steel) are suitable for drilling in metals or wood,
- Bits made of carbon steel should be used only in wood and not in metal as they are more brittle and less flexible than HSS bits.