The Pilot FriXion Ball Knock Zone is a next-generation erasable ballpoint pen designed for "darker and longer" writing. It features the new Premium Frixion Ink, which is 30% darker for black ink and 15% darker for red and blue inks. This ink is housed in a metal refill that increases ink capacity by 70% and extends writing distance by 40% compared to current Frixion Ball refills. Additionally, the pen includes a chip holder that securely grips the pen tip, reducing wobbling for more stable writing. It also incorporates a Noise Cut Knock system, featuring an internal spring that reduces knock sound by 78%.