M14 Thread Dia 19-102MM Vacuum Brazed Diamond Core Drill Bits Diamond Drilling Bits Hole Saw Hole Cutter

2,【Excellent raw materials】Selecting high-quality diamond raw materials and steel substrate, the top of the drill bit are used high grade diamond sand, its close arrangement, high degree of bareness, longer life; 

3,【Special Cutterhead Design】Sawtooth special cutterhead, greatly improving the sharpness and drilling speed, sawtooth has a number of chip removal groove, in the drilling can be quickly discharged dust, not easy to clogging;

4,【Efficient work】High diamond exposure rate provides faster and sharper drilling ;

5,【Long service life】Fast and smooth drilling, long service life;