The Wenger Snap Shackle is a retired, pocket-sized 85mm Swiss Army knife with a basic set of tools, plus a snap shackle (carabiner). The snap shackle makes it easy to clip this knife to a jacket, pants or backpack, for easy accessibility. This is a common feature on many current-day knives, but Wenger introduced this model in the 1980s, long before the shackle was commonly seen.