Bought two of these to try and cut an extra hole for the soap dispenser in our extremely thick Kraus sink. The price was right so I took two just in case. One broke which was a good sign as the pilot bit broke on the first one, it took a long time to drill the pilot hole (high pressure, low speed, rapeseed oil as the cutting fluid). the part worked very quickly and flawlessly. Despite the breakage, I am very satisfied with the product for the price and would buy it again.