2 1/2" Dry Core Drill Bit, 5/8"-11 Thread, with 3 Adapters Included: SDS Plus, SDS Max and 1/2" Hex Shank; 9.5" Drill Depth, 2.5 inch Diamond Core Bits for Brick, Block and Masonry

Without having the pilot bit in the middle it can be a little hard to get started. I had to use a smaller Harbor freight hole saw just to start once the borehole got 1/8 of an inch deep I switched over to this and I was shocked at how well it worked! It went through brick/mortar and cinderblock like it was nothing. For the price if your just a diy or home owner and your ganna do this only a handful of times you can’t beat it.

Good price for product. I was going thru a 8 inch solid concrete wall. it was doing fine- not water cooled so you have to give it a break every 30 seconds to a minute. but then I hit rebar in the concrete. the rebar stopped the drill cold, it wouldn't make a dent. I ended up having to drill thru the wall with a long concrete drill bit and making it work (was using to install a mini split thru the wall). it did the job, but won't make a dent on rebar. (and I didn't know I had rebar, or where it was in the wall, I could have just gotten unlucky).

Garbage! Gets dull a half in in!

I haven’t used a dry core drill in the past, so I didn’t know what to expect. My project involved drilling through a 8” concrete block wall to install electrical conduits. I followed the instructions which came with the tool, and attached the SDS to my harbor freight hammer drill, turning off the hammer function as instructed. I had prepared myself for 45-60 minutes of hard work, however this tool walked through the two holes in the block in about 10 minutes.. I’d made a simple jig to hold the core drill in place while it was starting the hole, all went well..This tool was easy to use, and the diamond chips on the leading are still very rough, they weren’t worn down, there is plenty of tool sharpness left for my next job.. I’m very happy with the purchase and the quality..

This bit worked great going through 10" of concrete very quickly and smooth to run conduit. Excellent price.

Worked great with the sds plus adapter. Cut through stone and cmu dry with no issue. Went very slow dry cutting through brick. Cored approximately 8 feet worth of holes and more than 3/4 life left. I'm always skeptical of off brand diamond blades but I would buy this brand again.

I wish I had bought this years ago

Only lasted one use going through a stone wall.

2.5 inch drilled right into my 8inch concrete fondation no issues. Took my time i let the drill bit cooldown , air sprayed the hole from time to time . People are just not patient enough

Worth the money. I highly recommend using water or at the very least a sprits bottle. I used to core drill through 8 inch poured concrete wall. It took me a while as I wasn’t using the correct settings on hammer drill. If using hammer drill use drill mode only. No hammer action. Nice clean hole. Worth every penny and at a good cost also. It’s not a quick process. But worth the money considering renting the bit or paying someone to do it professionally.

Got about an inch into concrete (no rebar) and drill bit started to shed the teeth and had cracks... first time trying to use it. Don't waste your money.,

works good.

Purchased based on the positive reviews. Worked better than anticipated. Drilled two holes. One through the 8” foundation and one through the garage floor (roughly 30 minutes). As others have mentioned, use a spray bottle as it will bind with the concrete dust. It gets a little tricky the deeper it gets so keep it straight as possible with moderate pressure (drill only). Didn’t hit any rebar so I can’t say anything about that. Took a chance and I’m glad I did.