Review on Diamond Porcelain Circular Drilling Drilax010080 by Mark Jefferson

They worked really well. I just had to cut a few holes. I think you could actually cut some holes if you let the water flow while cutting. I cut porcelain stoneware in less than 1 minute with a drill with the tiles submerged in water. No problem keeping the entire saw centered when cutting with a drill press. This was a problem as there is no pilot hole. they worked much better than expected. I bought one to see if they were good then bought a set plus 3 1/8. I highly recommend them. They cut as well as $56 for a single hole saw I bought. Maybe not as long as the $56 but then I only had to cut 3 holes for this bathroom project. The port hole saw could not cut a single piece of porcelain stoneware. They are even cheaper than sea freight and work very well.