"Visible effort" is designed for art students who often draw with pencils. It combines a pen cover with a pencil sharpener. Whenever the pencil is used more and more short, the handle is not good, most people will choose to throw it away. The pen sleeve, no matter how short can be put in, when used, and the normal length of the same, restore feel. And the other end of the sharpener can be stored in the waste debris in the pen. When the pencil is used up, the user has a great sense of accomplishment visually, while making full use of materials, energy saving and environmental protection.