My Piranha knife has come in handy on numerous occasions. It slices through tattered webbing with ease, has the precision to delicately cut away tape gloves, has the teeth and spine to cut through layers of gear in a medical emergency, and even features a handy bottle opener for kicking back after a long route.
The Piranha's blade locks in the open position easily with just one hand. Unlike some knives, it's blade also locks closed when clipped to a carabiner. Trango says that "it's absolutely impossible to open when clipped to a normal carabiner". This is the case with many carabiners, but some ultra-light carabiners, such as wiregates, do allow the blade to open while clipped. Make sure that you check the diameter of your biner in relation to the knife's keeper loop carefully before climbing with your Piranha. My setup makes it impossible for the blade to accidentally open while clipped, but to keep the blade from moving even a millimeter, I wrap mine with a super-thin strip of tape.
If you get caught out in the elements, a knife can mean the difference between life and death (read Touching The Void or Between a Rock and a Hard Place). Weighing in at a mere 7/10ths of an ounce, the Piranha is my silent partner. When you're in a pinch in the mountains, reach for the Piranha Alpine Knife. I don't climb without it.
For more information, please visit Trango.com
AMGA Certified Single Pitch Instructor
Colorado Mountain School &
Boulder Rock Club