I carried a Swiss Army knife in my backpack since junior high until I replaced it with my Leatherman a few years ago (half way through college). No hassles I helped my teachers work on computers during lunch break some times so I carried tools with me regularly...hehe Also carried a ham radio from 10th grade until graduation.<br><br>On the other hand, my buddy got kicked out of his school for having a knife over 3.5". The blade was an inch and a half or two, but they counted the handle too so he got expelled. Drrrr?!