This maker built a working Batman grappling gun in only a year - The Verge
I made a steampunk assassin's grappling hook. The grapple folds down and flips open when you push the brass knob. The gauge is DIY as well, the rope is no polyester, all
A home made grappling hook. (Crafts aren't always boring, boys!) | Grappling hook, Diy, Crafts
4 Ways to Make a Grappling Hook - wikiHow
DIY Grappling Hook Made From Household Items! : 6 Steps (with Pictures) - Instructables