A writing instrument that utilizes a small rotating metal ball at its tip to dispense ink as it moves across the writing surface.

A type of pen that features a metal sphere at the end which rolls to allow ink to flow out, providing a smooth writing experience.

A pen designed with a ballpoint mechanism, where a tiny spherical tip is integrated to control the release of ink for precise writing.

A practical and widely-used writing tool characterized by its ability to produce lines by allowing ink to flow from a reservoir through a small, rotating ball at the tip.