Trango Piranha Knife

Everyone needs a little knife and a way to carry it. The diminutive Piranha clips to a key ring or a carabiner so you can easily take it everywhere - just what you need to peel duct tape off your shoes or dig a splinter out of the palm of your hand. The locking blade is impossible to open when clipped to a normal carabiner but watch out, you can wiggle the blade tip past the low profile of some ultra-light carabiners. (Check this carefully before using.)