This wall mounted key hanger has 2 version:

• key hanger-flat
  • This one is for mounting with double sided tape.
• Key-hanger
  • Mounting with  4.5X30 screws (prefferd option)

For the screw mounted one: 

I have added a drilling guide so its easy to drill the holes perfectly sepperated from each other. (100mm) there is alse a ‘’test fit'' cube wich is a fast print to see if the holes are drilled correclty. if not you can always go into fusion 360 en change the parameter ‘’screw distance''. So you didnt mess up your wall. you can also change the sketch if your screws are bigger/smaller.