2" Wet Diamond Core Drill Bits for Concrete with Rebar, Brick, Block, Masonry, 15" Drilling Depth, 1-1/4-7" Thread, Laser-Welded Segments for Construction & DIY Home Renovation

I wanted to make water fountains out of two pieces of sandstone. I needed to drill 1” holes 26” through the length of the stone. I bought two bits from two different manufacturers incase one did not work as well as another. For once, Blue works better than Red and as it turned out the HBKEEN performed the best. I used the other brand for only a short period of time due to the obvious performance differences. The HBKEEN cut faster and was easier to clean out. The sandstone packs inside the core bit and I found it easier to wash the waste out with a hand pump sprayer than to try to knock the waste out. The HBKEEN has teeth with an inside diameter smaller than inside diameter of the tube, so the core is easier to clean out. The other brand has an inside diameter which is close to the same, which makes clean out harder. Even with the HBKEEN, it needed to be cleaned out ever inch or so. The only drawback to the HBKEEN was that the threads for the adapter are recessed about 1/2 inch or so and my adapter would not engage the threads. Using a hacksaw, I cut about 1/2” off the end of the bit. I ground the end so that the shoulder would be square with the adapter. Then it worked fine. I bought extensions so I could drill the full 26” from one end for a straight hole.

Formidable diamond core drill requires water for cooling, easily passed through buried 8” concrete slab, allowing me to drive a steel pipe through the slab in order to secure it as the receptor for a double gate vertical center rod. Word to the wise: the correct drill adapter must be bought separately depending on the drill’s chuck. Also a regularly powered drill with side handle is preferable to battery powered gear especially to control for the bit locking up occasionally in the concrete.

works good

Used it to drill a 2" dia. hole through an 8" thick slab. The bit worked as described and the teeth are still in good condition after 8" of use.

I purchased the 6"/12' diamond drill bits from HBKEEN and its excellent product. I used it to cut hard rock concrete with rebar in it, it went very easy cut the concrete with the rebar no problem. I would recommend HBKEEN for core bits. Thanks, and will buy again

This equipment is garbage. Do not buy. It is supposed to be rated for concrete and rebar. My 1st hole was halfway through, and it would not go any further. When I pulled it out the teeth/cutters were all bent in and destroyed. It hit the 1st piece of rebar and did nothing to the rebar but killed the coring bit.

Awesome product…highly recommend. Drill through 10” of concrete with rebar.

Used this to drill out a stripped concrete anchor. Worked great. Used a little water on the hole and it pulled out quite easily. Used it in dewalt hammer drill.

wow, what a quality made. over my expectation.

Thanks

NOT 1-1/4” I missed my return window unfortunately but the bit is too large. I use 1-1/4” dia bits to insert specific concrete sleeves. I have may brands of bits and they all work. This bit is about 1-5/16”L but it says 1-1/4” on the side. Nothing fits. Bit is useless now. If size matters be careful buying this it isn’t accurate.