What is Reddit's opinion of SE Diamond Burr Set (20 PC.) - DT220R?

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Sorry, went to bed. As long as you are slow and deliberate, I wouldn't think you would have a problem with cracking. There are some issues with the glass flaking off where you cut it, but that can be fixed with sanding.

https://www.amazon.com/Pro-Quality-20-Piece-Diamond-Rotary-Tool/dp/B000MOI9G6/ref=sr_1_1?ie=UTF8&qid=1499440765&sr=8-1&keywords=diamond+tipped+dremel+bits

I used these bits to finish the edges after cutting. The "globe" bit, 7th from the right, is what I used to drill a drainage hole in the glass.

edit: also, for sanding the edges, get Emery Cloth, it's in the sandpaper isle at home depot. It's sandpaper that is bound with cloth, so you aren't going to cut through on a sharp edge when you are sanding it down.

I've not tried it myself, but using a hand tool would seem to be the safer bet.

I believe i have also read someone say they used the Diamond Bur set that you can get on amazon. Google'd: This one maybe?

I think it's definitely worthwhile to drop a few bucks on glass drill bits. There about $15 in a hardware store or you can look online. I got this set and immediately made a nice steamroller. Be aware that they're too small for most downstems.

Hey man, awesome pieces. Would these work? I'd love to give this a shot myself

https://www.amazon.com/Pro-Quality-20-Piece-Diamond-Rotary-Tool/dp/B000MOI9G6