What's this style of mount/bracket called?

[granitestatedestroyer]

And where can I find the other half(wall side) of the puzzle to buy, or an stl to download and print?

Wedge bracket? Tapered bracket? You're stupid, just throw it away and buy a whole new bracket?

 

[Bogus One]

What are we hanging with it, Einstein?

 

[Etyler2]

Is it off your moped, or part of the sex swing, or for a computer rack of servers?

 

[92 s dime]

Just spend the $10 on amazon and get a new mount