The perfect pen for mechanics and car enthusiasts alike. This pen's click mechanism is made to look like a 5 speed transmission. Paired with a tire for the cap and a hub cap for the nib, this pen will catch the eye of many in the automobile industry for sure. To replace the ink, unthread the nib, remove the parker refill and spring, swap the spring onto the new refill  insert into the pen and thread the nib back on.