Feature:
1.This diamond drill bits are made of iron matrix with smooth nickel plating surface makes the drill bit rustless & durable
A thicken diamond coating on the tops offers superior cutting strength for maximum drilling outcomes.
2.The hole saws are processed for a smooth and exact finish. The chip groove is excellent for easily clean tile hole saw and chip evacuation.
3.Start your hole diagonally, make a round trace and then hold drill straight. When you using the diamond drill bits, please use lubrication (water), otherwise the diamond core drill will burn.
4.Can be used with a standard electric drill. This diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other