This drill bit made from high quality diamond electroplating.
All working length is diamond coated.
All with 3/32''(2.35mm) mandrel. Can be installed on Clamping range 2.35mm or above of electric rotating tools.such as electric grinder, hanging grinder, engraving machine, Pneumatic engraving penetc
Suitable for use in drill hole on jade, agate,stone, crystal, jewelry, ceramics, glass and semiconductor material etc. Please add some water when drill a hole