The original design perfectly replicated the disassembly of the dial pad password lock, but the three-digit password was too weak. I modified the five-digit password lock, increasing the number of password combinations from 216 to 7,776, greatly increasing the difficulty of password cracking. The model scaled down to 70% and 80% still had good performance, but the structure strength was insufficient below 50%.

For installation and principles, please refer to the original design author.

We have also designed a 6-9 digit password lock for entertainment purposes.