About this 3D model
Quick solar light holder I threw together. The pictures show it attached to a scrap board as I designed these as a gift that has not been delivered. As a barbaric American who used the imperial system, the solar light shaft is 3/4". I rounded up to 20mm as I designed this in Tinkercad. The screw hole is 5mm with a 10mm hole in the front to allow the screw head to pass through and a small recess so that the screw head does not block the solar light from being held. I attached it to the board with a 3" exterior screw I had laying around.