Review on 6-Piece Dry Diamond Drill Bit Set For Granite, Marble, Ceramic, Stone, And Glass With Hex Shank - Ideal For Porcelain Tiles - Sizes Include 3/16", 1/4", 5/16", 3/8", 1/2", And 9/16 by Hunter Feerey

The Dry Diamond Drill Bits Set is a fantastic tool for any professional or DIY enthusiast looking to tackle hard materials such as granite, marble, tile, ceramic, stone, and glass. These bits feature a hex shank design for a secure grip in any drill, and the diamond hole saw kits range from 3/16 to 9/16 inches in size, making them versatile for a variety of projects. Diamond drill bits feel durable and strong.One of the best things about these bits is their ability to cut through hard materials with ease, leaving a clean and precise hole. I used one of the bits to drill holes through porcelain for a bathroom shower. These definetly can be used for medium use at home. If using for commercial work, you're going to need a pack or two. The diamond coating ensures that they stay sharp longer than traditional bits, and they can be used dry or with a little bit of water to prolong their lifespan.I highly recommend these bits for anyone in need of a durable and effective tool for cutting through hard materials. Note that they are not suitable for use on wood. Overall, a great product. Reason for 4 stars on longevity is because I only used a few of the bits for my project. looks like they have lots of drilling left on them.