SHDIATOOL Diamond Core Drill Bits 2-1/2 Inch for Hard Stone Concrete Marble Granite Brick Laser Welded Dry or Wet Hole Saws 65mm

I have used several bits from Lowes and Home Depot pure junk the granite ate the teeth off before finishing one hole The bit from Amazon drilled the hole in just a few minutes and still in great shape . Would highly recommend

Holy cow that thing work better than expected and I was going through a cinderblock wall that had concrete filled cinderblocks it went through it like nothing and I did it dry, no water, and it’s like new still.

I only had one hole to drill to get a sump discharge pipe out of my foundation. I have precast walls which are about 1.5 inches thick, but it's 5000psi concrete, so it's very hard. I rubbed this bit down with some lubricating oil right before drilling. This worked great, went through in less than 5 minutes without having to pull it out to cool or re-oil. I can't really rate longevity with only one hole drilled, but glad I bought it.

After breaking two rigid bits I bought this one in hopes I would have better luck. This bit went through a 6 inch curb without issue. Highly recommend.

Had 3 holes in 8” solid concrete with rebar. I bought the expensive hole saw bit that only lasted 3” in one hole. After wasting 2 whole days I bought this on a whim. This was able to do all 3-3” holes. Prefect for the money.

I use these to drill holes in stucco sided walls. I just did one with 40 year old 3/4" plywood sheathing and very heavy stucco with heavy wire mesh in it. At a 45 degree angle. And this drill just buzzed right on through it all without water cooling or anything. I've drilled lots of holes in reinforced concrete, many types of stone, stucco, etc., using many different kinds of wet and dry drills. I have been pleased with the two SHDIATOOL drills I have purchased here and would buy them again in a heartbeat.

Great value for the money for sure, it cut granite like butter and if you used it wet it works even better. Does the same job as a $100-$150 one. I've drilled 3 holes back to back with no give on the bit or chips

Used this to mount a safety rail at the pool and it kicked b...tt.Highly recommendShould use a powerful drill...preferably a hammer drill.Really gets the job done

Bought this 1" bit as a replacement for my old one, which is over 10 yrs. old, 500 holes and is wearing out.Started a 57 hole pool safety cover install (concrete deck) with old bit. 47 holes wet. It started to slow down.Ok, it's done. Can't wait to try new one. 1st hole cuts 1/5 speed as old one. Jams in the hole 3 times. And then, can't get the core out. Had to literally smash out the core with hammer and a screw driver. 2nd and 3rd hole same. 4th hole, cutting tip cracked in half in the hole. Really PEE OED by now, took it off and finished the last 6 holes with old bit.Took it right down to the steel tube.

I used this to drill through concrete at my house for an electrical conduit and it went incredibly fast. Only note, I required an extensions but to get all the way through but definitely worked better then expected

Drilled 1 hole in soft marble backsplash and completely stripped all diamond cutting surface off hole saw. Absolute garbage bit.

Exactly as described and great delivery. Needed it right away and it was delivered the day after ordered (even before promised). Can't beat this service!

Tel que décrit, Facilement percé la brique.