Planishing Hammer The Planishing Hammer is for smoothing metal. The round side is used if the metal has previous raising hammer marks and these need to be smoothed out. The flat side will refine the hammer marks from the rounded side of the Planishing Hammer to a nearly smooth finish. This hammer is also used to size rings, form bezels and general forming of metal against mandrels and stakes. This is the most used hammer. Face sizes 23mm and 23mm Head length 75mm Handle length 250mm Type Large