Review on Diamond Ceramics Porcelain Ceramic Marble by Elton Luo

I've been looking for diamond drill bits that can be used to drill porcelain and most of them were sets of two or single for $15 or more so I decided to give them to you to try Have 10 pieces. (I think) less than a packet or two of the above items. I was drilling porcelain tile for an unfinished bathroom toilet flange and was taking a hell of a long time to drill the holes. I spent a good hour there drilling porcelain and firing these pieces. Good luck with pressure and a slow bit, but the tips will melt very quickly unless you water cool or do it slowly. I only have one left and there are about 3 holes. What sucks is that I couldn't really use 2 of these because I didn't label them during dry fitting. Wow, what a shitty day that was. Good luck with your project.