This hammer is made of Delrin, which is an exceptionally durable and strong plastic. It is specially designed with a smooth 1" radius face for precisely striking the side of our Mouthpiece Shank Repair Tool. It also has a smooth 1" flat face for general purpose. May be used for non-marring dent repair of horns by professionals. Hammer is approximately 7 1/4" in length and weighs approximately .25 pound.