It's a very stable Moonlander tenting kit. Superglue is necessary for this model; I've had a good experience with 3D printing-specific superglue.
This uses the screw that holds the default leg to secure the keyboard to the board. You can additionally use a 3Mx12mm screw on the outer side to keep it more secure and have less stress on the single screw+hole, but that is not strictly necessary :)
The uploaded files are for a 30º keyboard angle and the right-hand side (Simply mirror the base and board to get the other one).
I suggest gluing anti-slip feet to the bottom if you do not have a mouse mat that stops that already.
You can customize the angle in the OnShape document of this project https://cad.onshape.com/documents/09c15e1c8bdf112ca857fd8f/w/c01323884fe13c04ed316982/e/12356da3ac3deb4828c7011a?renderMode=0&uiState=66d444b13ad39a0f302b3a38
Make a copy and then adjust the angle in the variable studio, go back to the assembly, and right-click that tab to choose export!
The author marked this model as their own original creation.