I have been making caps a few at a time I have been using a snap-off utility knife for me it has been slow going cutting the caps off the paper. I got some carpet trimmer blades out of my carpet box they worked great. They are like a utility blade but tinner and way sharper and they have a chisel edge. https://www.homedepot.com/p/Personna-Carpet-Trimmer-Chisel-Blades-10-Pack-61-0146-EACH/100193906