I understand what you mean. I teach shop--saws, drills, hammers, shovels, etc. I keep a leatherman tool on my side because in Arkansas you are supposed to have an electricians knife for the student's use. I don't want to leave a knife laying around so I carry that one plus a pocketknife as well as an axe, chainsaw and machete in my pickup. (the kids use them sometimes too). The kids give me trouble, but I just show them the required items list and they shut up.