9PCS/1Set Vacuum Brazed 5/8''-11 Diamond Core Drill Bit Beveling Chamfer Finger Milling Tools Kit for Tile Marble Granite

Dia:6+8+10+35+50+65mm  Diamond Height:10mm  Total Height:60mm  Thread:5/8''-11

（1）Vacuum Brazing Technology provides the strongest bond between diamond grit and the steel tube body of core bit, work more sturdy than ordinary drills and longer working life.

（2）High diamond concentration and vacuum braze process provide high quality and good wear-resistant.
（3）The plating process makes for a harder, longer lasting electroplated bond so these drills will hold up well to consistent use,but once the diamond layer is gone they will need to be replaced.
（4）Don't force the drill bit, let the diamond grit do the cutting and drill at a slow to moderate speed, Drilling too fast will wear just off the diamond prematurely.
（5）Take the core drill bit out of the hole while you are drilling frequently.
（6）Various diameter range for your choice.
（7）The core bits can be used in either drill press or hand held drill, including cordless drills.
（8）Chip-free drilling, quickly and easily cut holes.