This clever pen + ruler combo is as lightweight as it is convenient - a balance we look for in all our rocking products. This favorite tool at Rocking Inc. HQ shares an aluminum DNA with many of our inventions. Utilize the precise 0.5 mm needle-point tip to get a clearer view of the writing area and ensure that you'll always have a ruler and straight-edge on hand. The top of the pen also features a ring for attaching to a lanyard or keychain. It is adaptable with a wide selection of refills.