3pc 2-5mm 5-10mm 10-15mm M35 Cobalt TiAlN Coated Deburring Chamfer Cutter 90 Degree Chamfer Countersink Drill Bit Set

Features:1. The same containing cobalt high speed steel material, the surface after a TiALN coating, 3 times can prolong service life.2. The TiALN coating super high temperature resistance, can be in the case of without coolant, long time use, suitable for dry type high speed cutting.Industrial Grade TiALN Coating,TiAlN coating surface will form Al2O3 which form a hard protective layer when drilling.(Perfect for high speed drilling)3. HSS - CO high speed steel after heat treatment + TiALN coating surface hardness up to 89 degrees.4. TiALN coating can do not need to add cooling fluid, more suitable for aerial work where the work is not convenient to add cooling water systems.5. 90 degree chamfer, CNC CNC, CBN grinding process.6. Higher accuracy sharper achieve drilling burr.7. Internal chip removal: To eliminate the phenomenon of flying metal shavings. Specification:2-5 is suitable for countersink 2-5mm hole, the maximum can be countersunk 10mm5-10 is suitable for countersink 5-10mm hole, the maximum can be countersunk 14mm10-15 is suitable for countersink 10-15mm hole, the maximum can be countersunk 21mm