Just bought some new rotary blades from HF and needed to open one pack. Finally got smart and took the smallest pair of wire cutters from my house tool box to open the plastic & cardboard. Cutters will now stay in my sewing box.
I confess to using my good scissors on more than one occasion. The wire cutters are next to prefect for cutting plastic. Granted, I get less than half an inch cut at a time---------but I only have to try once.