Review on Diamond LepoHome Ceramic Porcelain with Hollow Design by Dee Parson

Unbelievable for the price. So far I have only used the largest nozzle in the kit to install the diverter valve and waste on an existing tub/shower. The largest drill bit (closest to 1/2 inch) was used for both holes. In one case the hole was drilled out from the outside and the bit could be held and drilled without too much deflection. When I get to the concrete slab under the tiles, I switch to the hole saw. The second hole I drilled from the inside out, first with a standard concrete panel hole saw and then with a diamond hole saw for the tile piece. At one point I could see light through the tile as I neared the end, but I reduced the pressure on the chisel to avoid blowing out the tile at the end. In short, for a few holes or a small project, these bits are great. Of course, if I were a plumber or tiler, I would buy something more expensive. However, they are much cheaper than a single diamond drill bit from Lowes or Home Deport.