Knucklecase, A Badass iPhone Knuckleduster Case

The Knucklecase is an aluminum knuckleduster-shaped case for iPhones (4 & 4S). It even comes with a disclaimer:

This product is to be used only as a handle and protective accessory for an iPhone. Any other use of the product is considered a misuse, resulting in the forfeiture of any express or implied warranty of fitness for purpose. By purchasing this product, you agree to hold the Company harmless for any misuse of the product, which results in damage to yourself or third parties.

via Technabob