PRODUCT DEATILS:
NEW 10 pieces of 3mm (1/8 inch) diamond coated hole saw / drill bits. 3mm (1/8 inch) shank and 55mm total length. Suitable for use in drilingl holes in glass, marble, tile or granite.

Electroplated diamond drills are not recommended for drilling ultra hard materials.Use Sintered (metal bond) diamond drills for this application.Electroplated diamond drills provide very smooth surface finish quality & less thermal damage to the part being drilled than more expensive sintered (metal bond) diamond drills and are very good for drilling glass. .
Not recommended for drilling very abrasive materials such as sandstone and concrete (they will wear out on these materials almost immediately).
For Best Results: Diamond drills must be used with a continuous flow of water. Drilling should be carried out in a water bath. Use submerged-pressure sensitive feed. Full instructions are provided with tech support by email.
Unlike cheap imitations, diamond will not peel or pull out