A Detailed Look Inside a Retractable Ballpoint Pen to Explain What Produces Its Satisfying Click

In “How a Retractable Ballpoint Pen Works“, Engineer Guy Bill Hammack takes a detailed look inside a Parker Jotter retractable ballpoint pen to explain how the mechanism works and what gives the pen its satisfying click. The video is a step-by-step breakdown of a bit of engineering many people may take for granted.