Review on 💎 Enhanced Cutting Precision with BQLZR's Diamond Coated Marble Granite Tool by Robert Arneson

If you know what you paid for you can get 10 bits for $7. these bits did the job i needed them for, i had to drill 4 holes in the previously laid thick porcelain stoneware tile to accommodate the screws for the shower curtain rod. It took 3 bits to drill the 4 holes required and I have 7 unused bits left for future projects. The key is to ride slowly (starting very slowly), maintain a steady speed and pressure, and wet a little often. If you take your time and do this, you should have little to no performance issues with this product.