There are plenty of iPhone cases around, but there is nothing much like this case from TaskOne! It comes in four cool colours and provides the user with very useful tool kit that can help you out in all sorts of tricky situations, without actually bulking out the case too much.
These are the features available with the TaskOne case for the iPhone with built in tools;
2.5″ knife with 0.75″ of serrations
Small and Large flathead screwdrivers
Medium Phillips screwdriver
Pliers with integrated 3-6mm wrench
6 metric Allen wrenches (bike sizes 2-6)
Spoke Wrenches (0.127, 0.130)
120 mm ruler (110 mm on iPhone 4/4s)
This very useful case for the iPhone can be pre-ordered for just $90 (£56) for the black, grey or red. Alternatively, there is a special edition flame orange version available at $150 (£92).
Source [Coolest Gadgets]