This part was to replace a broken chair support of the Respawn 110V2 gaming chair, but several other chairs seem to have the same basic attachment mechanism for their footrest and this part might be a suitable fix with tweaking.
The part is best printed in a vertical orientation (so that perimeters provide resistance to vertical stress related to supporting the weight of legs). This will require supports, but the model works well with “support on build plate only” setting. There are some overhangs in the screw holes if you choose to only support on buildplate. It printed just fine on a mostly stock prusa mini for me, your mileage may vary though. I used 20% gyroid infill and 3 vertical perimeters with great success (though it probably wouldn't hurt to have more perimeters). I used PETG to avoid the brittleness that the stock part (which was injection molded) seemed to suffer from.
The author hasn't provided the model origin yet.