New Nylon Hammer Mallet Jewelers Craft Forming Tool 1" A+. This is a new nylon hammer. This hammer has a hardwood handle with a hard nylon head. Head diameter is approximately 1". Overall length is approximately 9 1/2". We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.