Review on Diamond Cutting Remover Porcelain - 💎 6mm to 50mm: Efficient Tool for Precise Cuts by Brandon Miller

I used to use these bits all the time. These are great cheap Chinese beats. They use, abuse and throw away. Whether you babysit them or beat their balls out, they won't last long beyond a few jobs. I'm sure if you use them in a puddle of water or keep them in the fridge for a little bit they will last a bit longer but don't expect heavy use durability. I drilled through uncured aquarium, tile, and glass brick with ease. Build a dam out of the water and slowly drive one end of the drill bit into the material to be drilled (if drilling free hand). Let the weight of the drill push the drill and let it do the work and you will be fine. I will buy more of these every time I need to drill glass/tile.