With countless smartphone protectors out there, manufacturers need to come up with some highly original - and useful - designs to stand out, and they don't get much more innovative than this. The iPhone 5 KnuckleCase certainly isn't the sleekest on the market, but sure does offer the best grip. Forged from a solid block of aluminum, it would probably also come in very handy should someone try and steal your beloved gadget. Chuck Norris has one (we reckon).