ARTU
5/16" porcelain plus tile bit and 5/32" pilot, the diamond ground porc plus cuts nice, clean holes with very little or no chipping, ideal for drilling porcelain tiles up to a scratch hardness of 8.
M-D Building Products Tile Cleaning Sponge 7 In L, 5 In W, Yellow
Marshalltown 3/16 In. Blue Tavy Tile Spacers (100-Pack)
M-D Building Products 3/16″ Tile Spacers (150/Bag)
Hole Saw, High Performance, 4-1/2 x 2-3/8-In.
Milwaukee PLUS-LOK™ SDS Plus Extensions