This tool is great for all your ROUND and FLAT applications. I weld a lot as a hobby. but when it came to deburring, square or rectangular tubes weren't good, I messed up a few blades thinking I was using them incorrectly. But if you are a whistle lover. It's great for mufflers, roll cages, bumpers etc, it's an essential tool in the box. also ideal for plastic for rough and jagged cuts. It's better than grinding or rubbing with a razor.