1) The diamond core bits can drill holes without chipping on marble, glass, ceramic tile and other softer stones.
2) They can be used to drill porcelain tile however life can be shortened significantly.
3) We also have brazed diamond core bits M14 and 5/8-11 thread for polishers and grinders.
4) They last much longer than electroplated core bits and other brazed core bits.
5) Each bit typically will last dozens of holes drilling marble and similar stones.
Add: 2308,Building No.1,Xinhe Central Plaza,Jialian Street,Simiing District, Xiamen,China