We are manufacturer of synthetic diamond powder and diamond tools, diamond drill bits are one major products of us , the detailed information as the fellowing:

A.Diamond electroplated drill bits: diameter from 1.5mm to 150mm, major for glass and stone working.
B.Diamond drill bits: diameter 5mm to 100mm, three models: straight shank, taper shank and thread shank, major for glass and stone working.
C.we can also produce the drill bits by your request.