A grappling hook, or grapnel, is a drag-looking device intended for grappling onto something. It typically has multiple hooks attached to a rope or cable; it is thrown, dropped, sunk, projected, or fastened directly by hand to where at least one hook may catch and hold on to objects. Generally, grappling hooks are used to temporarily secure one end of a rope. They may also be used to dredge for submerged objects.