2 New 1oz Ball Pein Hammers. This is a new set of two 1 ounce ball pein hammers. These hammers are great for metal working. The heads measures approximately. 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.