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Electroplated diamond drills are frequently used in glass and   composite industries (as well as some photonics / optics) applications.

Electroplated Diamond Drills are designed for small & occasional   use.

They are widely used by beginning diamond drill users (novices) in   numerous hobby/craft applications.

As well as home owners and contractors requiring to drill a few holes   when installing tile, marble, shower doors, glass mirrors, and etc. (not   recommended for professional or serious industrial use).