Pen Scriber For Marking Jewels, Metal, Glass and Plastic. This is a new carbide pen scriber. This can be used for marking on metal, glass and plastic. The handle is knurled for a firm grip. It measures approximately 5 3/4" (146.05 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.