Hobbies and Crafts How do you open the safety on a martor knife? Are box cutters legal? States Box Cutters Are Legal In In nearly all states, it is legal to carry certain forms of knives either concealed or open carry. ... Knives with blades that are shorter than 2.5 inches.Feb 22, 2021 Related Posts:Is Certifiedccw com real?What kind of knives are illegal?There is a guide to standard sofa sizes and dimensions.Is a razor blade considered a knife?