this is an organizer for nail tips and press on nails. you can size the nail/tip and set it in the corresponding spot to keep the tips/nails organized while you glue them down.
this is a remake. I extended the space in the middle to accommodate longer tips and removed some of the bulk from the bottom of the organizer to use up less filament. I believe I found the original file on cults but I am unable to find the original creator now.