The "Uni-Alpha Gel" mechanical pen with shock absorbing gel grip. This model is equipped with a shakashi mechanism that allows the core to come out when shaken. Outstanding fit. The grip fits the individual handle and is easy to grip and fatigue-free grip. Exceptional grip keeps you focused. Stay focused Focus is determined by the change of brain activity in the forehead field. Maintaining concentration is different, so there is no guarantee of the effectiveness of each person. High resilience = stable The new grip is "hard" with high rebound gel. When it comes to hardness, it also increases rebound force. At the beginning of the squeeze, you can feel the softness of the Alpha Gel and the gel will return to its original shape while writing, making it hard and stable.