Boxer cutter key ring

Very simple design allows you to break packing tape. I designed this one day after I could not get in my house because I bent my keys opening eBay packages. I work in a workplace that we are not allowed to use knives, so this sort of thing is very helpful. Also good if you fly a lot.

Good printed in PLA, Nylon or Polycarbonate as it will be stiff enough to break the tape.