Double gang electrical box mount for Kindle Fire HD8 Gen12 (2022) with recessed screw holes. Top edge is chamfered for easy “clip-in”.
Modeled with OnShape: https://cad.onshape.com/documents/cd7bdb3a5f35f59552eb3d0b/w/ae43ea53ab76e720914917f4/e/f965b555dc695e77550c8726
The author hasn't provided the model origin yet.