I bought to sharpen my stone fireplace. Concerned about how to remove the cement joints as there aren't as many solutions in the US as there are in England. I came across this solution screwed onto my standard angle grinder. I'm glad I did. He wrapped both sides of the firebox and most of the hearth in one piece. Just make sure you do it slowly, and if you have soft rocks, really hold on to the chopper as it wants to follow the path of least resistance. The only downside is that I wish it could go deeper in one pass. This means I want the diamond portion of the tip to be longer so I can rake more in one pass. But you only do two passes. And make sure the woman hold the vacuum cleaner next to the brick and your dust problem will go away.