Review on BINOTA Concrete Shank Cement Brick by Todd Markel

I needed a tool to drill holes in 8 inch cast concrete. Basement walls for installing a radon system. After researching a range of products and reading reviews I settled on this set as it offered multiple hole sizes and 2 driveshafts (SDS and SDS Max). The size of the pipe used and wanted to start with a smaller hole and only enlarge it if needed. For the drill motor I used a HF Bauer 1641E-B SDS rock drill bit. I started the hole with water to wash out the dust from the hole but it made it sticky, the sediment covering the cutter teeth made a bit of a mess and slowed down the process. I only ran the drill at medium speed so the cutter never got more than a little hot. I cleaned the hole and ran the router dry with the utility from that point on. ty vac for waste disposal. This sped up the process. All in all it took me about 3 hours to go 8-9 inches through the wall. Again it was fairly solid concrete. The editor never stopped, but it was a slow, steady process. The resulting hole was a bit oversized (about 70cm), but it was reasonable. You will need to stop from time to time to gouge out the center of the concrete as the cutter will only cut the edge of the hole. This applies to any cutter of this depth. The cutter's length with the long shank was enough to cut 8-9 inches through a concrete wall with little to no depth. A few weeks later I had to drill a second hole in the wall. As before, I scanned the wall with a metal detector to avoid hitting the rebar. I ran this hole dry at the same medium RPM and evacuated it with a vacuum. This time I needed about 2 hours, with the same wall thickness. After I finished the hole I looked at the cutter and noticed that a few teeth had broken off. I'm not sure when this happened as the cutter was stable and never seemed to slow down. The hole was very clean, the reinforcement did not touch. Not needing a new set I contacted the seller and explained the type of hole and asked if I could just buy the 65mm bit. They kindly sent me a new cutter and SDS shank (free) which then got lost in the shipment. When the seller found out about this, he sent another cutter and expedited it at his own expense. That's exceptional customer service. Finally, for those considering this set, I used it on a vertically poured concrete basement wall. It's difficult and slow no matter what cutter you use. This tool is faster in hollow cement blocks or slabs. Any time you're drilling into concrete, do yourself a favor and use a metal detector to avoid hitting rebar. I'm a mechanical engineer and know how to get the most out of the tools I buy and I was impressed with this set even though I knew the job was going to be challenging. I'm not easily impressed, but I was very impressed with this product and especially the seller. I will definitely buy from them again. The reason I left such a detailed review is that I had trouble searching to find adequate information about these cutting plotters. Finally, this set also includes the SDS Max stock as well as the SDS stock I used. Both are about the same length.