This is a small drawer to srew under the desk. I use it to have my usb sticks and sc cards of my table but have them always on hand.
You need one mount per drawer. I frictionwelded them together to have them mounted side by side but that is not necessary, they will also work fine if only screwed in side by side.
I used 2 4mm by 20mm wood screws depending on the table, you can use up to 4 per mounting part. Other screws will also work fine just make sure there head sijnk in the corresponding holes.
I printed the drawers as they are and the mount upside down.
The author hasn't provided the model origin yet.