Even Batman would steer clear of this Bat Knife-knuckle combo. Why? Because this thing is plain crazy. Named Interceptor, the design by Tom Anderson started out as a simple brass knuckle, then the designer decided to go overboard with fang-like blades that take a shape into a gadget or tool Batman would use. It sells for $56, but we can’t quite find anything that it would be useful for, save fist fights with bears.