The original design is great, I love it. But the original design of 3 digits, I think the strength is not enough, I remixed a 5 digit lock.From 216 possible combinations to 7776 possible combinations.

70% and 80% still have good performance, less than 50% may not be effective due to insufficient strength of the material.

It is recommended not to use PETG when printing at a ratio of 70% or lower, and to use PLA to ensure better rigidity.

Please refer to the original design author for installation and principle.

At the request of a friend, I recreated 6-9 digits Combination Padlock,further increases the complexity of the password.