This is your trusty Opinel stainless-steel blade—with a few extra tricks in the waterproof, fiber-reinforced handle. For one, you'll find a 110 decibel whistle to call for attention or to alert others. Then there's the detachable tick remover, which takes care of pesky parasites in a pinch. The ultra-functional package is rounded out by a cutting hook for twine and wire on the back of the handle, doubling as a keyring if you feel like attaching it to your bag. All that adds up to a durable, practical piece of kit that's more utility tool than knife.