Name a tool in a toolbox, that's right it's a hammer. Obviously the absolute most commonly used tool on the planet, there will always be a need for hammers and new hammers in general because of that. A claw hammer is a hammer primarily used in carpentry for driving nails into or pulling them from wood. Historically, a claw hammer has been associated with woodworking, but is also used in general applications. The list of general uses of a claw hammer are endless which is what makes them so popular! No tool shed or toolbox is complete with out at least one.