When the traditional wrench is used to screw the screw, it needs to be raised up after one turn, and then continue to screw from the beginning. The "time-saving one-way" wrench uses the principle of the bicycle flywheel overrunning clutch. When the screw is screwed once, It can be restarted along the original trajectory, reducing the repeated upward process.

Country
China

Year
2016

Designer
Xueyou Liu, Shuqi Zhu, Shuaizhi Chen, Wei Jia, Wenwei Wu