Review on 🔍 Enhance Your Tile Project with the Bosch GT2000 Glass Tile 4 Piece Set by Joshua Donnis

4 holes must be drilled in reconditioned bathtub porcelain stoneware. I used the smallest 1/8 bit to drill the first few holes. The 1/8 drill was only enough for 2 holes and 1/2 of the third. I've used this brand for tile before and it worked great, but not so well for porcelain. I called Bosch and they recommended natural stone NS bits which I bought and the packaging clearly says "NOT FOR USE ON PORCELAIN"! I opted for diamond-tipped porcelain drills.