Click Pen comprises the frame, a thruster, two cams, a guide pin, a spring, an ink cartridge, a ballpoint at the end of the cartridge, and other parts. When the button at the end of the pen is pressed, the system moves from one position to the other. This causes the ballpoint tip to be pushed forward for writing. Click Pen is a type of ink pen which have a spring-loaded ink cartridge which retracts and extends outside a protective housing. By clicking downward on the top of the pen, the tip is extended and locks in place at the bottom of the housing for use.