This is a replacement key for @MakeAnything's lockpick puzzles (small size, 1-5). We've had a few keys break as people rotate them too aggressively, so needed replacement keys without reprinting the whole lock puzzle. Printed on it's side, it's extra strong and works well!
Find the original puzzles by Devin Montes (@MakeAnything) here: https://www.myminifactory.com/de/object/3d-print-lockpick-puzzle-01-74848
Check out his YouTube channel here -- it's pretty great: https://www.youtube.com/channel/UCVc6AHfGw9b2zOE_ZGfmsnw