- Surface Nitride Coating can keep sharp and prolong service life
- Quench Hardened Layer M35 Cobalt HSS blow thru hardened steel like a hot knife thru butter
- Four Spiral Grooves four cutting blades design guaranteesa super fast and ultra smooth cutting
- Clear Fiber Label easily controllable, and nice to use
- 1/4" hex shank fits perfectly with conventional and impact drill bits
Great for DIY and working in home improvement, suitable for a variety of metalworking projects