2 Oiler Pens For Clock & Watch Repair. This is a new set of 2 oil pens. These are for use on clocks and watches. The needle end covers a large capacity. Each measures approximately 4 3/4" (121 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.