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used 6 bits to grind holes in tile, i make them small then use the grinders to get the holes the best size, glad i ordered these, also smooth down many tile with them, they last pretty long too, well worth the money.
It's really great set of burs, I was hesitated at first because of the low price for a whole set but then decided to give it a try and that's because I'm still practicing and learning.I gave it a try and the result was even better than I thought it would. I've never achieved a smooth surface from the first time but with these burs I did.Regarding the kit it self, just one burr that wasn't good, the tip was bent a little bit and I didn't need it anyway :DIt's a great deal for newbies, go for it.
Very high quality. Much better than a name brand diamond burr I purchased at the hardware store (one of which cost 3x what this entire set cost).
The burs are fairly sturdy. Some of the finer bits break easily, but the rest do the job. If grinding and shaping remember to keep moist with water or lubricant. Otherwise you rip off the diamond surface (did this, not thinking).
I have just started learning to engrave, and had been using the accessories that came with my rotary tool, but then I got this set and they are pretty much all I use now. I highly, highly recommend this set for anyone in the engraving craft. So many new options have been created since getting this set.
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