When I'm installing aluminum soffits and curbs, you're standing high on a ladder or scaffolding and trying to grab small nails around to secure them. With this screwdriver, you insert a nail into the screwdriver shaft, place it where you want it, and then hit the bottom shaft of the screwdriver with a hammer. This reduces the number of dropped nails and their misplacement, and also plugs holes in aluminum siding due to the lack of a nail head. You get used to it, and you can feel the nail being