Arduino NANO case

Distinctive features are:

1. adherence to clearances for easy installation,
2. compatibility with USB micro and type c,
3. pin markings on the underside,
4. retention of button function,
5. and the ability to view pin signatures from the top,
6. maximizing the minimum possible design.

The problem of 2 rows of mounting pits overlapping on the sides of the breadboard is well known, it is a characteristic of all arduino nano cases.