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Premium Diamond Grit
- The core bore drill is elaborate aluminum alloy, selected diamond teeth, and high-frequency welding technology, providing steady and rustproof.
1-1/4"-7 Universal Thread
- Our diamond core drill is suitable for most types of machines in the market. You can install the drill on your previous machine effortlessly.
Quick Chip Removal Hole
- These core drill pilot bits are equipped with cooling chip removers for fast chip removal, aiming to operate directly on the wall and reduce noise.
Rpb
Reviewed in the United States on February 22, 2025
Fast cutting bit seems to hold up good 20 holes so far looks like new.Very pleased
joe
Reviewed in the United States on January 6, 2025
This 4" bit combined with a 12" extension gave me the ability to drill an angled drainage hole through an 18" thick lava rock wall.
leo
Reviewed in the United States on January 27, 2025
Calidad y excelencia
Michael L. Drew
Reviewed in the United States on January 2, 2025
Used it to drill 4 holes through 8" thick granite slabs then used it to frill through 8 inches of concrete+4 inches of granite. Worked like a charm. Not sure how many holes it can do before it wears out but it worked for the five I needed. Seems like it cuts pretty fast too. I used a special masonry drill that provides water to the bit while drilling.
Jesse S
Reviewed in the United States on September 19, 2024
Had to drill a 1" horizontal hole through a 12" concrete foundation, so I bought the 1" x 15" diamond bit and borrowed a rotary hammer drill with an adapter. I used a garden sprayer clamped to a ladder to spray a constant stream of water onto the bit. This worked well to keep the bit cool and lubed. I also stopped often to dip the bit into a 5-gal bucket of water. The concrete was 100 years old and very hard, so it took me 90 minutes to get through 12 inches, but the bit worked well. I wasn't expecting much for $38, but the bit did its job and shows no noticeable wear. Most important thing is to keep it wet.
Customer
Reviewed in the United States on November 29, 2024
Only cut four hole so far in 10” concrete walls. Works as it should, cuts fast-and clean. Price was very fair, shipping was fast. Overall very happy would buy again or others from this seller
Carla
Reviewed in the United States on April 8, 2024
I used the 5.5 inch monster diameter to drill a hole in the garage brick wall so I could add a portable AC unit vent for when I was working in the garage woodshop.Tips: We tried drilling from the outside first, but the drill just kept circling off the area we needed the hole. So, we tried from the inside and put it on my rolling workbench as a way to stabilize it. This sucker is heavy, especially with the big hammer drill.Ease of Use: Once we got in on the brick and stabilized well, it went through nicely. However, if did take quite a while. Having the workbench as a support made it possible. It's just so heavy, it would be hard to hold without some type of stand.Connections: I did have to go through 3 different ordering of the core that connects it to the drill. I kept ordering the wrong size. So, pay careful attention to that.It made a nice, clean cut in the brick. It's actually pretty cool.
Kurt P.
Reviewed in Canada on June 9, 2023
The bit arrived quickly and well packaged. I tried it out last night to core 10” deep holes into solid precast concrete blocks for weight iron fence posts. I did 13 cores that took about 5 minutes each to core to depth, without any sign of where on the bit.I’ll be doing a railing set into a stone wall next…. Happy with product!
Andy
Reviewed in the United States on March 5, 2023
I ordered this for two reasons. The first was for a DIY mud Jack on a small, pump house slab. The second is to bring in pipe for water and electrical on the inside of an existing garage. I ended up needing an adapter to use it with the equipment I own. I found one on Amazon for a reasonable price that fit my hole hawg. A hammer drill would have been better but the adapters for them are pretty expensive for the amount of times I’ll use it. I finally got around to putting some holes in the slab I jacked up today. It cuts well and went through 6 inches of concrete in 10 to 15 minutes. Starting the core was challenging and took almost as long as the coring itself but once I got it going it just worked itself through. Not a bad product to take care of a couple of unusual projects.
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