Dry Diamond Core Drill Bit,HIGHDRIL 2pcs Diameter 32mm 1-1/4" 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

Cuts are perfect

I'm actually using these to cut holes in foam. The bits used on wood do not work on foam -tears it apart. These work very well and will never wear out on foam, lol.

I bought this set of five 6mm diamond drill bits to install a shower door which needed 8 holes drilled through the ceramic tiles. I assumed each bit would last 2 or 3 holes. Yes, each lasted about 3 holes, but overall, they are sturdy and did a nice job cutting through the tiles. Ceramic is quite hard, so it was no surprise they wear out after 3 holes. For the price and the reasonable performance, I give it a thumbs up.

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

I had 2ea - 3 inch concrete slabs (24"x24") used as outdoor/pool small table tops that need to double as umbrella stands. Problem was getting a 2" umbrella hold all the way through the exact center. After marking diagonally and penciling the desired circle, I filled a large flat top OJ bottle with water and drilled a 1/4" hole near the top. Flipping the bottle over produced a nice water stream on the diamond bit as it cut through the cement slab like butter. Keeping the bit cool & lubricated made the drilling go super quick. Only problem was the slabs are 3" thick and the bit is a little more than half that depth. So once the bit bottomed out, I chiseled out the upper drilled out section down and drilled again, completely removing the desired circle core. The bit did this twice, being water cooled by the water in the OJ bottle, never slowed down or got dull. I'm guessing it's good for at least 2 more holes if I needed them. Highly recommended - much cheaper than the ones from big box stores that cost 3-4x what this did and 1 bit will go a long way if you use a normal drill at high speed, cool and lubricate with water and don't use hammer drill function - simple circular high speed drilling is optimum.

Works well with or without water. I ordered two for a great price but one has continued working perfectly, so probably will never need the second.

I ordered a two pack of the 43mm core bits late on a Sunday night and they were delivered around 3pm on Monday. I used an 18 volt Ridgid drill and cut through a solid brick wall, some concrete, and a 2x10 to run a 1” conduit through the 7” wall from outside my house into my basement. No special hammer drill needed- just my regular $99 18 volt Ridgid drill with a 4 amp hour battery. These hole saws are no joke! I expected to need both of them to get through this wall, but one hole saw did the job in about 15 minutes and it looks like the abrasives are still good for a few more bricks. I needed a cold chisel and a hammer to chip out the core since the hole saw can only cut to a certain depth since the core is in the way. They have a unique shaped shank, so I don’t know if there’s an extension available for them, but I used a 43mm/ 1-2/3” hole saw, so my entire drill chuck was able to follow the hole saw into the hole to allow me to cut 5” into the wall from the outside, then I drilled a pilot hole from the outside so I could find the center and finished the 43mm hole from the inside. I don’t review products anywhere, but I wanted anyone who might be wondering if these things really work to know that they really do work. I included two pictures with the review. I didn’t expect these to work very well, but I was wrong. I saw longer versions of these for well over $100, so just get a cold chisel slightly smaller than your hole saw and save yourself a bunch of money.