This is a leg designed for the PRO Gaming Keyboard x13 from Cepler
The leg folds in to lay the keyboard flat and extends out to support the keyboard. The leg doesn't always stay in, but it will only be able to do this when you lift the keyboard up sometimes.
Print with at least 50% infill and absolutely no larger nozzles than 0.6 to get enough walls on the part. use support to hold up the pins on the sides that go into the keyboard.
The author marked this model as their own original creation.