Speaking of impact driving screws, this is a peculiar device: a manual impact screwdriver. If you have a seriously stuck screw can you position this thing on it, then hit the back end with a hammer. This pushes the bit hard down into the screw while an internal wedge mechanism translates the hammer force into a rotational force on the bit, hopefully loosening the screw without stripping the socket.
Location: Box 39
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!