Our investigation found that most of the grinding pens are easy to sweat and slip due to long-term and fixed-position holding. In order to solve this pain point, we tried to design grinding pens with different textures and materials to test. The results showed that aluminum alloy not only can provide good heat dissipation for the motor at the end of the grinding pen, but also is not easy to sweat. The combination of beautiful lines and comfortable grip greatly reduces the fatigue caused by work.