There are many cable chain out there but not all have these features:
Using the universal link you can have the chain bend in one direction and stay flat in the other, or by flipping over every other link the chain is rigid in both direction. Flipping just one link and the bending swaps to the opposite side at that point in the chain. The possibilities are really endless.
One of the big drawbacks to the chain links is that in order to maintain the rigid structure the area where the cable reside must be closed. Not so, with this link, the cable cover piece snaps into place allowing you to load the wire without have to disconnect anything.
The desin is based on a conglomeration of images I have seen showing different links in action but is my own design.
I designed this with several things in mind and I have achieved them all
Chain lays flat
Chain locks to fully rigid
Chain can reverse direction
Chain is loadable without disconnecting any wires
Mounting can probably occur by putting a small screw through the cover plate and then snapping the first link on to that fixed plate, but haven't tested that yet