bath door handle fastener

Fasteners for the bath door handle. Designed for accordion/bifold-type doors, with a hole for inserting a 15x15 mm square handle. If other sizes or shapes of the handles are required to attach, please edit the model with a simple CAD application such as Tinkercad.

*This model is made to the standard of doors commonly found in my country (Japan), but I am not sure if this is universal design or not.