After looking through some cheap tile bits (box of 10 for $8.99) and completing 8 of the 16 holes on porcelain tile, I bought this one here for the same price . ! To see if I'm lucky enough to finish the job! Used water etc. Broken in the middle of the second hole, even worse, the tip fell into the hole. This is how it worked and continued until one of the drill bits in the set of 10 cost 10 times as much!