Review on SE DH10HS Diamond Hole Saw by Justin Peck

These diamond drill bits work very well. The problem some people have mentioned is the difficulty of starting a cut without having to "walk" the saw over the surface they are trying to cut. I had to drill through the bathroom tile to install the railings. Before I started drilling the tile, I cut a 1" hole in a 3/4" thick board that was about 3" (width) x 6" (length). I then ground down the hole to make it a little bigger, allowing a 1 inch saw to just about easily go through. When I was ready to drill through the tile I placed the guide plate on the tile and centered its hole where I wanted it. hole in the tile. I then pressed it firmly against the wall, fed the hole saw through and into the tile, and then began drilling at a very slow speed to cut through the tile. Once the cut had started well I removed the board and finished cutting the hole in the tile with no tile, then they were also able to hold the board with their free hand once they had the saw in place just before they were done to start drilling). I drilled 6 holes in the tile and this method eliminated the "walking". without much effort. Remember to run the drill at very low speed (after doing my first cut and board removal I used water to cool the bit). Go slow, take care, good luck. UPDATE 06/16/2016. I tried making the template detailed in my original post out of a 4x8 inch piece of cardboard instead of wood. I cut a hole in the cardboard with the same hole saw I was going to use. Tiles in the bathroom since I've been drilling with my other hand. Start drilling very slowly and you'll soon have a perfect circle deep enough that you'll have to stop using cardboard. Be sure to water the tile at the end of the cut, poke through the hole saw a few times to keep it cool and sharp, and also remove dust (I installed the handrail through the ceramic tile and plaster wall behind the tile).