This Hammer is a special one. The German name is Ziselierhammer. In English it would be chasing hammer but that's not very specific and i'm very unsatisfied with this name because there are plenty of hammers which would be used as chasing hammer. It's like this tale from the Innuit which have 29 words for snow (not fact back checked) and there is a lack of names for my tools in the English language. Please proof me wrong would love to learn if there are other words than chasing. 😊

This kind of hammer is used for smithing patterns, ornamentals and other forms in metal. Zieselieren is a very old technique and not very common anymore.