Eye hooks can be frustrating to screw in with your bare hands, especially if you are installing them into an overhead stud. This simple trick allows your drill to do the dirty work.
Turning multiple hooks and eye hooks (especially the small ones), is a tedious process. Using a lever attached to a drill/driver makes it much easier. An Allen key is the perfect shape to fit securely in your driver, and it's strong enough to torque a hook into wood.
You can also use a hook to turn a hook. Insert the hook into your driver and crank down hard on the threads then loop it through the hook that needs turning.
Festool makes a drill attachment to accomplish this same task for those that like spending money on more tools, but an allen key or second hook should do the trick in a pinch.
Hook & Eye Driver [Metal Maestro -- Instructables]