Handle expander for screwdriver Xiaomi Mijia WIHA

First you need to print (adjust the size) of the "test" file, and then print the main details!!

For ease of use, it is necessary to individually select the position of the expander on the screwdriver handle.

1) The narrow part allows you to rotate quickly and with a small load,
2) the part closest to the hand, which has corrugation, helps with medium effort.
3) The maximum effort helps to apply the tetrahedral extension when you rest against it with the outer side of the index (2) finger