Includes black, blue and red ink. Active people such as those in construction, medicine, transportation and law enforcement need a pen that will stick with them at all times. The Uni Hard Lock solves the dilemma of lost pens with its powerful clip that can clamp onto everything from blouses, shirt pockets, jacket pockets, lanyards and notebooks. When unlocked, the pen can be clipped and unclipped as usual. But with a simple flip of a switch located on the top of the cap, the pen clamps down tight like alligator jaws and won't let you go. It will stay exactly where you put it!