Snap Back Watch Case Opener For Watch Repair. This is a new snap back watch case opener. Great for opening watch snap on case backs. It measures approximately 5 1/2" (139.7 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.