Durable and easy to use, a good assistant for your work and life. Precision manufacturing, quality assurance Diamond drill bits will not be anti-rust treatment, and some rust may be produced on the needles, but it will not affect the use.
Diamond coated drill bit for drilling holes in glass, tiles, ceramics or other materials.
Use water when drilling.
Great for making clean and precise holes on glass, tiles, for grinding for polishing.
Specification:
Material: diamond coated steel
Shank diameter: 2.9mm
Cutting part diameter: 1.2mm
Cutting part diameter: 5.5mm
Cutting length: 15-18mm
Full length: 40-45mm
Price for 21pcs.