Detailed description
Vacuum Brazed Diamond Core Bits (CB-3)
Vacuum brazed diamond core bits are very aggressive and are able to drill smooth holes with high precision.
The diamond core bits can drill holes without chipping on marble, glass, ceramic tile and other softer stones.
They can be used to drill porcelain tile however life can be shortened significantly.
The brazed diamond core bits have 5/8-11 thread or M14 thread or G1/2 for polishers and grinders. They last much longer than electroplated core bits and other brazed core bits. Each bit typically will last dozens of holes drilling marble and similar stones.