The Survival Grizzly Hook is a cross constituted with a mechanical claw and a grappling hook. When it touches down naturally, the jaws are pushed open due to the gravity. And the jaws close when reversed.
Tie any rope or string that is firm enough for large weight to the ring buckle at the bottom. Then use it for catching, opening the covers of bottles or cans, pulling the broken car even a emergency weapon. The provided O-rings keep the Survival Grizzly Hook closed firmly.