I've been buying many books lately. I get them from Barnes & Noble and Amazon (So much to learn and so little time.) Anyway, I've been cutting up the cardboard evidence of my purchases with my RC4. (I've learned that if one seeks matrimonial harmony, it is wise to hide cardboard delivery boxes from She Who Cooks.) Anyway, the RC4 is a cutting demon. I've destroyed a couple dozen boxes and I've only touched up the blade on a charged leather pad once. It's scary sharp.