This 3D printed puzzle was designed by the prolific burr puzzle creator Christoph Lohe. It is sold with his permission and he will receive a percentage of the sales. The puzzle ships assembled.
Chris had this to say about the puzzle:
Mini Lock
This burr design was born when I wanted to create a beginner's puzzle looking like a padlock, but with a minimum number of pieces. Burrtools level 6.7. The shackle opens before the first piece comes out, so it could be operated like a combination lock.