2" Dry Diamond Core Bit w/Pilot for Brick & Block, SDS Plus | Core drilling into masonry, brick, block, and soft natural stone, 9.5" drilling depth, SDS Plus connection

Great core bit, went through 4" of hard old brick without much trouble, slow going as the brick is so hard and 80 years old, but it went through. Tried it on concrete and it went through that much much quicker, so it was definitely the hardness and density of the old brick that was the challenge. Meant to be run in rotary only mode, not in hammer mode, i tried hammer mode very briefly just to see if it changed at all, it made zero difference on drilling speed but it was apparent it was rounding off the diamond cutting tips much faster, so stick to rotary only no hammering.It was easy to use, just a lot of work due to the brick i was fighting. I have drilled through this brick previously with SDS bits and its just as slow of a progress, its like drilling hard glass more then masonry, they just don't make em like they used to!Overall a good value for the money, very little wear after the first use, should make multiple holes before its worn out, at the cost it seems expensive but try hiring someone to make the hole, its cheap then.

I purchased 2 cores to drill (2) 1.75 and (1) 2.75 hole thru CMU for my project. Once I checked them in my drill, I noticed a lot of wobble between the drill bit and core. I built a small fixture to help support the bit and keep me level during the process. I also had a helper guide me to stay square. Getting started was a little shaky, but even pressure and speed allowed the drill to create a groove. I'm very pleased with the outcome. Not sure these are good enough for industrial use, but they worked fine for me. Very pleased.

Used this in conjunction with a cordless Ryobi SDS Plus to drill a 4” hole through brick. It did it perfectly. I cannot beleive it actually worked, but it did the job perfectly. It took probably about 30 min to get through, but it left a perfect hole with zero cracks or Spaulding. A professional tool couldn’t be better. Don’t expect super fast drilling, but it will work

When starting the hole on the rough brick surface the core drill tends to walk away from the pilot hole. This is because of the length of the tool. There is a lot of flex in the pilot bit. I’m sure this would not be an issue on a smooth flat surface such as concrete block. So I had to adapt by removing the pilot bit after the core hole was started and then it cut a fast clean hole through the brick And completed a nice looking job. Appears to be very little if any wear on the cutting edge of the core bit after three holes through brick and mortar.Tool arrived before expected and was packaged securely.

Bought this to bore (8) 4” holes in the side of my ICF house(6” thick poured concrete). Started with the pilot bit but then removed it to avoid binding issues. The upstairs has pink bar in the walls and I went through 2 of those on the 3 holes needed. No problem. The downstairs has steel rebar and I avoided those using a metal detector. It took a LONG time to drill all 8 holes but this bit is still usable(3 hours per hole!!!). The bit is clearly marked that it is not for concrete. But, it worked. I WOULD NOT recommend using a core bit of this size with a huge drill unless it is properly braced. I had to drill these holes on a ladder by hand. My Bosch bulldog(the long one, not the huge squaty one) will break away if it binds instead of breaking your arm. All holes were dry. Keep the dust out of the holes about every 1/4” and it will keep cutting.

I needed to drill a 4-1/4" hole through the brick & wood of my basement exterior wall to run a 4" diameter dryer vent. A local plumber wanted at least $150 to do it and since I already own an SDS Hammer drill I decided to do it myself using this 4-14" hole saw. I started by drilling a pilot hole using a 14" long 3/8" masonry bit. I installed the bit that came with the hole saw and I really cranked it down using a long, SAE allen wrench- it's funny that the wrench that came with the hole saw isn't the correct size- it's too small and I suspect it's metric. Like others who reviewed this hole saw my bit came loose and the allen screw flew away- I'm lucky I was able to find it. If I were to ever need this hole saw again I would probably use the blue threadlock compound. Anyway after the hole saw was about 1/2 in I didn't need the pilot bit anymore since the hole was deep enough to hold the saw in place.So using my SDS hammer drill it took about 40 minutes to get through the layer of brick. That was pretty exhausting but it did the trick. I was hoping to use the hole saw to cut through the wood layer next which was as thick as a 2" joist. It was slow work and I made it halfway through and i gave up and used a wood drill bit around the perimeter and oscillating tool to cut the remainder of the wood core out- Success!Looking at the hole saw after this 1 job I don't know how sharp it still is- I may never use it again but it would be nice to know that it still is in good shape if I decide to for my own home projects or to help out a friend.

I used this tool to drill through stone and a motor foundation into an addition's crawl space. I encountered no significant issues with it, and it was relatively inexpensive compared to what it would have cost to hire someone for the job. The cutting process took a bit longer than I had hoped, but I ended up making a straight, smooth hole. Overall, the tool is durable and could cut through several more foundations.

Did an awesome job on brick

Wasn't even 2 inches into cement block and the sds adaptor broke in my drill. Tried ordering other adaptors for it and they aren't the standard size.