Review on Enhanced Diamond Countertop Porcelain Bathroom Installation Cutting Tools: Hole Saws & Accessories by Osoulo Sharp

Bought to make a few holes in leftover granite pieces from a kitchen remodel that I used to make patio side tables. Now they hold umbrellas perfectly. Surprised at how well they worked for the price, they cut through the granite like butter while still holding water in place while I drilled. Left a nice even edge with a perfect hole. I tried the guide they offer but found it didn't work that well and ended up cutting a hole through the leftover plywood with a regular hole saw and then pressing it against the granite to close the drill bit start. Once the bit entered about 1/8 inch, I took out the guide and drilled it through with no problem. The only problem was the depth. The internal depth is 1-1/16 feet, which I did not find in the product description. It doesn't go all the way through when cutting the 1-1/4" thick granite, so I had to carefully gouge it out at the bottom. which worked for me.