Mounter of laser pointers with outer diameter of φ14.6 mm for optical post

When twisted, the switch is pressed and the laser pointer is turned on.
The optical post fits a 1/2 inch diameter or 12 mm diameter.
The slit version will fit even if the outer diameter is slightly larger than φ14.6mm.

You need also:
M3 x 10mm hex bolt x1
M3 nuts x1