Material - These diamond drill bits made of high-speed steel that is durable and have a long sevice life.
Size - 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", 14mm/0.55", 16mm/0.62", 18mm/0.7", 22mm/0.86", 26mm/1.02", 32mm/1.26"
Ideal for - This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.They have diamond coating like any standard bit for these purposes.
Easy to use - This diamond drill bits are high quality and good performance that excellent for making clean and accurate hole.
Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.