"Pilot Frixion Point Knock 04" has newly appeared to the Pilot Frixion series. The Frixion Series is a popular writing instrument that can erase handwriting with frixional heat by rubbing it with an erasing rubber. "Frixion Point Knock 04" is an ultra-fine type erasable ballpoint pen equipped with a "synergy tip" that has a smooth writing taste while being fine. "Synergy tip" has both the functions of "corn tip", which has high strength and stable writing, and "pipe tip", which has a smooth writing taste and is suitable for fine writing. The ultra-fine 0.4 mm pen tip is suitable for writing on small parts such as notebooks and materials, and the handwriting can be erased by rubbing with a special slim-shaped erasing rubber on the back of the pen. The body design is based on the typical "Frixion Ball Knock" design of the "Frixion" series, using metal clips and mouthpieces for a luxurious finish. Compared to the "Frixion Ball Knock", it has a slightly slimmer shaft diameter of 10.5 mm and is easy to store in a notebook or suit pocket.