1. Tri-bit design: cutting edge CNC grinding teeth tricuspid centering is better will not produce offset quasi-drilling and fast.
2. High carbon steel material: quenching high hardness good abrasion resistance durable.
3. Round handle design: suitable for the market bench drill the use of more convenient.
4. Removable Adjustable: use a wrench to remove or adjust woodworking and five-bevel chamfering.