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The tranditional monkey spanner is only horizontal way to unscrew the object, however its difficult to unscrew when another object is near by and it blocks th spanner. Furthermore, it also makes less holding space for hand when the object is on the wall.
This design is combine with axis of rotation, it supplys multi-angle to unscrew and it is fixable. So it is more useful and convenient.
Chi-Tang Yen Hsin-Yen Chang Yi-Jie Sung Wen-Shiou Lai