1. When inject cold water while working, can effectively extend the service life of the drill bit.2. It is recommanded that when using the step drill bit, the metal thickness is less 3 mm.3. Made of HSS material, suitable for workpieces with hardness below 25 HRC.
● High speed steel along with titanium coating ensures outstanding durability.● Quick change 1/4" hex shank is a great universal fit.● Two-flute design provides faster, smoother, accurate cutting.● 118 degree split point up allows you to cut faster throughout multiple uses, and prevents sliding.
