Review on 🎯 Precision Strikes Made Effortless: Adjustable Tension Automatic Center Punch by Christopher Shavers

They work very well. However, they only work on one try. If you try to use it again you won't get the right tension to create the indentation. What I do (perhaps not necessary on others) is slightly unscrew the bottom half and then retighten after each use. It seems to restart and it works fine. It's a lot easier than using a hammer. I recommend this product