The faithfull tile max drill bits have a newly designed and unique asymmetric tip which has been diamond ground from the best quality tungsten this enables the user to drill through a wide range of materials such as pel 5 class porcelain ceramics fine stoneware marble concrete engineering brick and even granite the asymmetric drill design reduces resistance by 25 ensuring that there is no wandering on start of drilling there is also less chance of cracking or chipping dependent on tile type whic