Review on Masonry Lionmount Carbide: Versatile Plastic Tool for Multiple Purposes by Brian Malith

I ordered these bits for a specific project. I needed a 5/32 bit and wanted to use it in my impact wrench. Using a conventional screwdriver prevented the bit from penetrating the hardened concrete. This beat worked on the first try. It bounced lightly against concrete. Overall the kit is of good quality and should last me for some time.