Carpentry work is a skilled trade that involves the construction and repair of wooden structures. It includes hammering, nailing, and sawing, which are all essential tools for the job. Hammering is the process of using a hammer to drive nails into wood, while nailing is the process of joining two pieces of wood together with nails. Sawing is the process of cutting wood with a saw. All of these processes are necessary for carpentry work to be done correctly.