It’s designed to secure the Circuit Playground Express using M3 hardware screws and nuts. Use the links below to download the STLs files. The part is oriented to print “as is” in your slicing software. Import the STL and use the “center to bed” feature, if your slice has this option. The bottom of the mount is completely flat. The mount features six standoffs that are sized to fit M3 sized machine screws.

https://learn.adafruit.com/touch-tone-for-circuit-playground-express/3d-printing