I live in Mexicali, Baja Mexico, here any knife with a blade bigger than 2 inches it is considered a "Arma blanca" (white weapon), and you can get detained by the local police. Arma blanca it's a slang referring to objects with a sharp side that can be used to hurt people (knives, machetes, broken bottles, etc.). In fact, i carry a gerber compact sport that has a blade a little bigger than 2 inches, and a local cop that is a friend of mine told me i can get in trouble if someday they pull me over an check the multi tool. But until today i still havent been in trouble for wearing it in my belt', maybe i'm lucky or it's just a law that they don't usually apply.