-100% Brand New and High Quality
-Material: Diamond
-Size: 0.4mm , 0.5mm , 0.6mm , 0.7mm , 0.8mm , 0.9mm , 1mm , 1.1mm , 1.2mm , 1.3 m , 1.4mm , 1.5mm , 1.6mm , 1.8mm , 2mm , 2.5mm , 3.0mm ,
-Shank diameter: 3/32'' - 2.35 mm.
-Working length: about 8mm
-Total length: 41mm - 45mm.Different sizes, total length may be different.
-This drill bit made from high quality diamond electroplating.
-All working length is diamond coated.
-All with 3/32''(2.35 mm) 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