![](https://carbon-media.accelerator.net/0000000clE0/lfwwBhuzPHFd4swwf627Mi;960x640.jpeg?auto=webp)
Two padlocks bound together represent the concept of yin and yang in Chinese/Taoist philosophy as interdependent dualistic forces.
![](https://carbon-media.accelerator.net/0000000clE0/6dMe2iUUfxlbTN4x0v3C8t;960x640.jpeg?auto=webp)
Contrary to expectation, the light is unlocked by the dark key and the dark unlocked by the light key. As such, neither can operate without its perceived opposite.
![](https://carbon-media.accelerator.net/0000000clE0/jZjoUysB0sCgqj0WvqL1Xa;960x640.jpeg?auto=webp)
![](https://carbon-media.accelerator.net/0000000clE0/kU6dNhidvLbeLvA829dQDN;960x541.jpeg?auto=webp)
![](https://carbon-media.accelerator.net/0000000clE0/kSh1ZS7iEAnfGzyEfFZXDe;960x538.jpeg?auto=webp)
![](https://carbon-media.accelerator.net/0000000clE0/3ud1TPnTlyybTMXLOvPb32;960x450.jpeg?auto=webp)
*working lock mechanisms derived from plans by Tim Detweiler