I replicated hacker Samy Kamkar’s combination lock project. It can be adapted to open similar, non-Master padlock, locks and, with an optimized dialing method, open them in less than a minute.
Combo Breaker, by Samy Kamkar is a motorized, battery powered, 3D printed, Arduino-based combination lock cracking device. It is portable, open source, 3D models provided, and exploits a new technique he discovered for cracking combination locks in 8 attempts or less, but in an even more exciting, automated fashion.