Works Great and would recommend it to all! Even came with a grinding disc that was easy to use! Glad I made the purchase! Thanks Vevor. Dont know what I would do if I had not bought this item! So happy that they find these items and make them available to us that are not in that business!
My original review was pretty harsh. I am updating it because I figured out how to get it to work.I drilled a large pilot hole with a different bit. Then I cut a hole into an old piece of wood to use as a guide and screwed it into the wall. I got through two layeres of brick fairly easily.The cutting disc it came with was pretty good.
Better have an SDS MAX if you want to drill with this one.
It does its job if you have enough power behind it.Cuts a nice round hole as a cylindrical cutter should. I was coring in hard south Texas caliche. It was rough going with an old SDS drill. The SDS MAX is the MINIMUM you should use with this. But it does cut, I drilled 3 holes so far.
Homeowner/DIY tips: We are installing a 8" exhaust vent through our exterior brick house. Here are so things we learned along the way.1. The 8" core bit is heavy and you need something like a joist/stud drill that has enough torque/power to make this work.2. A heavy duty hammer drill/SDS demolition/rotary hammer will make drilling easier but these fancy drills are not required.3. periodically wet the core bit in a bucket of water to preserve the diamond coated cutting bits. It will be a pain in the butt but it will make cutting easier. You don't want to ruin your bit because a damaged bit will not cut or will take forever to cut.
GREAT BANG FOR THE PRICE. GREAT QUALITY. EASY TO HOOK UP. EASY TO USE. I INSTALL EXTERIOR METAL RAILINGS. INSTALL 2" PIPE TO CONCRETE. CORE HOLE FOR INSTALLATION OF PIPE.
Performed well through 8" of solid concrete. Tracked solid, even with a hand drill. Would buy again and the price was great which also included the bit and cutting wheel.
The product worked great other than the Allen screw that holds in the drill bit. It doesn't hold it in tight and if you try to tighten it, it will break.
I'm giving it 5 stars because it did exactly what I bought it for. The price was great! The pilot bit was the weak point as it didn't really keep the core drill centered to start the hole. It wobbled all over due to its length. I was able to chisel a starting ring and from there the core drill did its job. It even cut through the rebar that I unluckily encountered. You have to be patient and take frequent breaks to allow the core drill bit to cool. This is required with all dry core drilling.
This is an awsome core drill, i was skeptical at first, because of some bad reviews i saw. But this thing went thru a foot of rock wall with no issues. Bit is still intact,all teeth are good. Would definitely recommend it.
Steveo 
