The diminutive Trango Piranha Alpine Knife clips to a key ring or a carabiner so you can easily take where you need to go. The blade is machined from surgical quality 440-C stainless with a serrated blade—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 can be opened and closed with one hand but it's absolutely impossible to open when clipped to a normal carabiner (Watch out! You can wiggle it off of our SuperFly carabiners and some other ultra-light carabiners. Check this carefully before using.) Bottle opener included.