Dual Head Rubber & Nylon. Hammer for Carpentry, Construction, Engineering & Shaping Metal. This is a new dual head rubber and nylon hammer. Great for carpentry, construction, engineering & shaping metal. The heads can be unscrewed for easy replacement. The length of the head measures approximately 3" (76 mm) long. The face of the head measures approximately 1" (25 mm) in diameter. The hammer measures approximately 10 1/2" (266 mm) long 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.