Review on 💎 Premium Diamond Porcelain Circular Drilling Bit - Drilax010105 by Radney Taala

I have some of these Drilax diamond drill bits. All were great. I tile for work and often use the smaller sizes, they last a long time. I have yet to wear any of these out and have drilled over 100 holes in stone, porcelain and ceramic tile with a 1 1/2 inch hole saw. 4 1/8” I've only had to use it once but it's great. This is the size I had to drill to install a 4" fixture in the shower where the ceiling was tiled.