Dual Side Click PenIntroducing the world's first dual side click pen system, engineered for precision writing and optimal refill compatibility. This pen auto adjusts both in length and tip size to allow the use of 100's of refills, creating a fully custom pen that ticks all the boxes on your list. Patent pending dual side click mechanism Length adjusting for different length refills Self adjusting collet system minimizes tip wiggle Machined metal construction for