They are ideal for grinding and shading glass engravings. I use them with an adjustable Dremel chuck and they work great. I usually use for area filling and fine shading lines and whatever stone qualities you can have, from coarse blind which makes it very bright white to finer which makes it smoother which changes the look. shade a lot. I posted a small picture of a piece of glass that I practiced and saw what can be done. You can do a lot more than what you see in this picture. They are very inexpensive and practically do not wear out when processing glass. I will for sure buy these again.
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