Whether you’re an apartment dweller, office manager, or a janitor, you might have a lot of keys. And like LL Cool J says, those keys are jingling baby. A crafty user on Instructables has demonstrated how to put your keys into a swiss army knife/leatherman style gizmo. Now you can move quietly without attraction attention like a cow with a bell on it. Just don’t try to bring one of these devices onto an airplane, since you’ll probably be detained. And don’t let anyone see you using this to actually open a door, since it looks like you’re trying to to pick the lock with some sort of large tool. But other than those two minor points, it’s great!