HSS DRILL BIT
1. M2 is the same as Japanese SUMITOMO Brand, and M35 is imported from Japanese Nachi Brand.
2. Higher temperature of quenching and tempering: Quenching higher 5-10 degree, tempering 3-5 degree than other competitors.
3. Process: Fully-ground process-high precision, long service life and good stability.
4. Unique design for the flute with patent is more suitable for various materials.