Dry Diamond Core Drill Bit,HIGHDRIL 2pcs Diameter 25mm 1" with Triangle Shank Vacuum Brazed Hole Saw for Concrete Granite Marble Glass Porcelain Tile Masonry Brick

Bought to make a hole for my kitchen countertop to install a faucet for my reverse osmosis. It works perfectly, phenomenal quality, great value for the money(go to home depot it’s like $40). It cut the hole with accuracy, super easy to use. Highly recommended

wow! I usually install reverse osmosis systems so I need to drill a hole in the counter for the new faucet, usually (quartz or granite). I normally buy Milwaukee or ridgid, these drills bits normally have a short lifespan a dont worth the price you pay for them. This drill bits perform better and faster and the durability is awesome! I already done aroun 8 holes in quartz with one drill bit and probably will last a handful more.

I bought this pair to cut a drain hole for a low spot in my patio, beside the screen enclosure. They cut fairly quick for approximately half and inch of depth.I would recommend stopping every 1/3”, stop, remove the fill material, and resume. I think that’s part of why the first one bent and became wedged in the hole. See above.While water is mot necessary, it does help keep the bit cool. If the bit get hot them it will be more prone to failing. See above.The one remaining bit has some life left on it and I would buy again.

Had to drill an additional hole for the sprayer on our new farmhouse sink and this did the job no problem. No chipping or cracking. We also drilled the hole for our new tub spout, right through the ceramic tiles on the wall. Again, no issue. Make sure you start at an angle so it doesn’t roll away. Once you get a little groove then slowly lower it. Go easy and let the tool do the work, you don’t need to push. And keep it wet. I had my hubby stand by with a spray bottle and squirt water at the area while I drilled. Very happy with this purchase and the price. Definitely recommend.

This drill bit really saved me 100s of dollars. It did the job done where I was looking to make a hole on my granite counter top. Initially I felt like it is not working as it is drilling very little for continuos 10 mins. Even after 25 mins I thought the first one lost the grading part and I started using the 2nd one. After few mins I felt like smoke and then I dipped in water. Then I realized that it didn't lost the grading part, it is from the debris created surrounding the drill. From then for every 1 min I was dipping in water to remove the debris so it made easy to drill the hole. But to drill 1" of granite it took nearly 1 hr for me.

Great long lasting bits. As a professional tile installer, these are my go to bits. Cut fast and very long lasting life.

I was skeptical to purchase a bit away from the “top tier” brands but wow, this works! It cored through my brick walls with ease. A good product for a great price - I’m in!

I'm a contractor and I use the kind of bits a lot on porcelain tile. I used to spend a fortune at lowes on the diamond bits but never again. I would burn through the expensive bits from lowes pretty fast. They just don't hold up. Now these hold up excellently. I've drilled several holes and they're still going strong. I would recommend you have a decent drill as these bits work better at higher speeds. Overall excellent product especially for the money