Leather working tack hammers are used frequently in upholstery work. They are thin hammers, usually with steel heads that have two different ends. A “starting” end allows the tacks to be placed and hit to be “started” into the material. This same end can be used, with its grooves, to pull tacks out. The other end has a small, flat hammering surface to hammer the tacks in.
Other versions of tack hammers include those used for saddlery. They also have thin, steel heads and work well for forming leather or performing tack work in difficult-to-reach areas. In this case, their small size is an asset. Tack hammers come in maybe subtle variations, each with unique benefits specific to their planned use.