Review on Vermont American 13310 4 Piece Glass by Kevin Singh

I used these to drill through a glass bottle and it worked very well. Use plenty of water to lubricate and these bits will work just fine. Good price for a set and they really work as advertised. I used a 1/4" size to poke a hole in a Jack Daniels Single Barrel (very thick bottle) and it took about 10 minutes to poke a hole in it. DS