Review on 💎 High-Quality Set of 2 Diamond Coated Hole Saw Drill Bits (23mm) for Glass, Ceramic Tile, Marble, Rock, and Porcelain Surfaces by Michael Gupta

I ordered on July 6th, shipping is scheduled for September. The beats arrived within a week! (Revane still thinks they weren't delivered lol). I had to drill a 1 inch hole in a cinder block basement wall to install an outlet outside. I figured this would carry both bits given the price. To my pleasant surprise, the first piece chewed through two cement walls of a 2x2 inch cinder block with ease. I didn't even try to cool the bit with a jet of water during the immersion. I just dunked it in a glass of cold water every 30 seconds or so. That was enough. The job is done in less than 5 minutes, the bit still looks good and ready for future use, and the second bit remains in an unused state. A great DIY tool at a very, very low price compared to what your local hardware store would charge for a diamond coated household saw of the same diameter.