Wire wheels can be dangerous too. I was cleaning our oven racks while holding them in one hand and using the grinder with the other. I caught an edge with the wheel and rolled it into my hand. It healed pretty well. Sorry, no pics of the fresh wound, just the offending tool, my bandage progress and it mostly healed. Had that been a grinding wheel or cut-off tool I'm sure it would have been much worse. Lesson learned. Clamp it and 2 hands on the tool! I have to admit that I took the guard off my other grinder because it got in the way when i was trying to do something. I guess I should put it back on...