Review on Dremel 663DR 4 Inch Glass Drilling by Michael Glassburn

Product update: I was wrong. I had a feeling it wasn't Dremel's fault. I've been good at it for so long that I decided to do a Google search. I stumbled upon a few hacks and now it works GREAT! ----- Inferior quality. I used this piece to drill 4 holes. Fifth hole failed and continued to overheat. I had to buy another one for a normal drill. I expected MUCH more from Dremel. I use their products for everything. I sincerely think this particular piece was defective because I know the Dremel is better than this one.