Firstly it's a well made product and nicely packaged. Even includes an extra anvil and stamp. In use it does its job very well - leaves a nice clean groove (I've used it on .055" sheet metal - probably mild steel). BUT! be 'NO'. It's not easy to use. The line you're trying to follow on the sheet will be slightly obscured by the nibbler tip. So for any accuracy you should really make us a simple pattern or guide so you can press the "tip" on it. You'll also need to hold the tip down so the edge of the tip rides on the sheet metal. Another reason to have some kind of guide. You must also secure the part you are working on. because you are very busy with a rather bulky punch tool and a drill. Tip: Keep the beater and anvil well lubricated.