Edit 1, September 4, 2018: Change the size of the screw hole to 6.55 mm.
Make the dovetail groove a bit higher

Image source:https://www.amazon.com/dp/B00YHK9M7Q/ref=asc_df_B00YHK9M7Q5431317/?tag=hyprod-20&creative=395033&creativeASIN=B00YHK9M7Q&linkCode=df0&hvadid=193147589203&hvpos=1o1&hvnetw=g&hvrand=6549661370427998159&hvpone=&hvptwo=&

Dimensions: 425 x 225 x 42 mm

The diameter of the screw hole: about 6.55 mm

A total of 3 items!

If conditions permit, it is recommended to use acetone to bond all components before hanging them!

Use expansion bolts to fix the product to the wall!
It hasn't been actually installed yet. I'll update the user experience after it's been hung up...