The term 'Tool Used With a Hammer' can be solved by two different crossword solutions: Nailset (7 letters) and Nailse (6 letters). A Nailset is a tool used to drive nails into wood or other materials. It is usually made of hardened steel and has a flat end that is used to set the nail head below the surface of the material. A Nailse is a tool used to remove nails from wood or other materials. It is usually made of hardened steel and has a pointed end that is used to pry the nail out of the material. Both tools are used in conjunction with a hammer to complete the job.