Chamfering Countersink Drill Bit Rustproof 3 Flutes 6 Pcs 6.3mm-20.5mm

Feature： *100% brand new and high quality *Made of cobalt steel material high hardness rustproof solid and durable *The chamfering with a groove easier to discharge debris and the High Carbon Steel Drill Bit not easy to blunt *High hardness smooth chip processing can fulfill the chamfering deburring and cone processing *6 Pcs drill bits with various sizes : 6.3mm 8.3mm 10.4mm 12.4mm 16.5mm 20.5mm *The high-quality countersink drill bits can remove burrs well without leaving scratches *Suitable for processing metal and some non-metallic materials such as carbon steel thin iron plate insulation board PVC board wood plate and so on *Material: high speed steel 4241 *Color: silver *Size: 6.3mm 8.3mm 10.4mm 12.4mm 16.5mm 20.5mm *Flutes: Three edge chamfering *Quality：6pcs Package list： 6 * HSS Countersink Drill Bits