Review on Kyuionty Diamond Coated Ceramic Porcelain by Andrew Britton

These are junk and they don't work. I tried 4 bits on 1 small hole and they are useless. The so-called diamond drill is stuck like sand with Elmers glue and falls off as soon as you touch the tile with it. I bought another brand that worked great. This must be a scam. They sell this crap that costs them a dollar and for $8 most people won't waste their time thinking about a refund. DO NOT BUY!