Dry Diamond Drill Bit Set,10-Pack Diamond Core Drill Bits for Tile Ceramic Marble Granite Glass Brick Stone,1/4 Hex Shank Size 6,8,10,12 mm

I used this to drill a hole in our quartz countertop for an extra faucet (we got a reverse osmosis water filtration system, which I also highly recommend.)I tried it at first without a jig and it was clear that was a bad idea so I used my portable drill guide. I was concerned about not being able to clamp the guide down but it wasn’t necessary. Just using that to keep it straight made it so that the hole was perfect.I used two bits to get all the way through the stone. It’s possible I could have done it with one but so much dust built up on the bit after about 2/3 of the thickness that I decided to switch. I also then added water. I’m not sure if that helped with cutting but it was getting EXTREMELY hot and was starting to smoke and it helped with that.The guide was one that’s listed on ace hardware for $43 but I’m certain I got it for less at harbor freight. You’ll definitely need one if you’re going through stone, especially if you want to preserve the finish of the stone, as it’ll jump around a ton.I did not use a hammer driver, as I wasn’t sure how that would go, so I just used my lil’ old battery powered Ryobi drill. I’d say it took about 2 min to get through 1.25” of quartz.

The product came quickly and I was able to get the job done.

Solid bits that do walk a little if you don't get them on edge of have a bearing tool to align them. Overall they work and are a good price. It's also nice that they can be put in an impact if you need to.

Worked great for making drain holes in ceramic bowls to turn them into planters.

I have only used 2 of the 6mm I had to use Tapcon bits to start the hole as these walk all over the tile trying to get started, it took one and a half bits to mount 2 safety hand rails in my mothers shower. They did make a clean hole for the anchors once started.

The FASTORS Dry Diamond Drill Bit Set has proven to be a reliable and versatile tool for my DIY projects. This 10-pack set offers a range of sizes from 6 to 12 mm, making it suitable for drilling through various materials, including tile, ceramic, marble, granite, glass, brick, and stone. The 1/4 hex shank size ensures compatibility with a variety of drills. The diamond core drill bits deliver efficient and precise results, cutting through tough materials effortlessly. I appreciate the durability of these bits; they have shown excellent wear resistance even after extended use. The dry drilling capability is a time-saver, eliminating the need for water cooling. Whether you're a professional or a DIY enthusiast, the FASTORS Diamond Drill Bit Set is a valuable addition to your toolkit, providing reliability and versatility for a range of drilling applications. Highly recommended for its performance and durability.

These are not easy to use. The instructions seem simple but unless your item is clamped down or you have a heavy sturdy grip, they shift when you start. Having a pre-drilled hole would make them better but the point of them is to not have to have that.Once they start, they do work, but they do not save you time.

So far so good! I've tested these out on shells and terracotta with great results and I was using a low power 20v drill with moderate speed but really low torque.However, I have not tried to use it on class or ceramic tiles yet which I haven't a need for yet nor anything spare to test on and as far as glass, I am reluctant to even try that. But as these went through the shells with relative ease, I feel they will stand up to any material they are listed for use with.Even though the bits have a wax filler for cooling I still used a little water but unless you are using a highspeed, high torque drill and doing a lot of drilling I think the wax is all you will need.I actually like the fact that they have individual cases so I can keep them in my to work bags and my home tool box so I always have one on hand. And at 1.30 USD apiece this is a steal of a deal.Highly recommended.