This ball pein hammer head is made of drop-forged steel. The head is securely mounted on a hardwood handle, and has a flat face and a domed face. Flat face measures 0.50” (15 mm) diameter. Domed face measures 0.66” (16 mm) diameter. Head weighs 4 oz (113.4 g). Great for jewelry repair and shaping metal. It is also used for direct hammering on soft sheet metal, wire, as well as soldered forms, and rivets.