I'm in the Union of Locksmiths and we make a lot of pipe hangers. I saw a youtube video for this tool to clean the ends of whole threads and other screws for my hangers. I've been using it for 3 weeks now, I've made about a hundred hangers or more, which means all the thread on each end. It still works and it still works great and I am very happy with this tool I would recommend it. Other people complain that it's not stainless steel, apparently they don't know they're steel, stainless steel is much harder than regular steel. I'm sure what this tool is made of. So if you want something that can deburr stainless steel, you can get something made specifically for stainless steel. I blame the user for trying to use it on stainless steel because you're an idiot.