Review on Versatile and Reliable: General Tools 1271M Arch Punch for Precise Hole Cutting by Jeremy Bradford

We used cheap #2 gasket kits you can get at the hardware store for about $10. They were fine, but the crumbling little hole punch and block of wood that came with them didn't fit initially. Enter this. After seeing some examples on YouTube and reading some reviews here, I settled on a 3/8" hole punch. The difference between day and night! Instead of minutes of hammer blows, a few quick hits and the fabric was perforated cleanly. Conservative, this increases productivity by 20x, be sure to use it with a wooden block underneath to protect the sharp edge.