Premium-Grade HEX SHANK Titanium Step Drill Bit - 3/16" to 1/2" by 1/16"
- Heat-treated high carbon-steel shank has excellent flexile strength without brittleness
- Titanium Nitride coating increases cutting surface hardness, lasts up to 5-times longer than HSS
- Two-flute design for faster drilling; self-starting tip won't skip--no need for center punch or pilot hole
- Hard-to-find hex-shank design works with quick-change bit adapters, won't spin in chuck
- Drills holes form 3/16" to 1/2" in 1/16" steps (3/16, 1/4, 5/16, 3/8, 7/16 & 1/2")