Review on Raizi Mortar Raking Diamond Bit For Mortar Removal (5/16 Inch X 1 Inch) by Omar Thorndike

So glad I didn't listen to the bad reviews. This thing was expensive, but it probably saved me 2 hours of work and cleaned my brick joints much better than I could do with a chisel. Makes quick work of removing old loose and cracked mortar. Chews through it like a hot knife through butter. The only way I could see breaking this if if you tried to put too much force on it. If your mortar is so hard that it is creating resistance, then it probably doesn't need to be re-tuck pointed.