Review on Masonry Concrete Ceramic Tungsten HBXVD by Rod Evans

I needed to drill some holes in a concrete slab to hang plywood in my basement. I didn't have the right bits for my new impact drill so I ordered some to try. I was very happy with how they worked. They are very sharp and straight and cut easily into the concrete. At the end of the project part of the cover was removed but they were still in fantastic condition. I like to add them to my toolbox when I need to do heavy drilling.