The Wenger Natuare Otter is a handy multi-tool that is 65mm (2.5") long, with a steel cellidor body and 3 useful tools. It weighs 44.53 grams. Click for more info about the Natuare Otter Swiss Army knife. Click for more about our used knife grades. Like all Wenger knives, this model is retired, and becoming increasingly hard to find.