sundance-communications.com Forums Telephone Services Outside Plant OSP Construction Abandoned/Obsolete Armored Copper Drop.

Here ya go:

https://www.britannica.com/technology/terneplate

And if you score it with your splicer's knife, along the axis of the cable, and then try to bend it back, the razor-sharp edge will trim your finger nail, right up to your first knuckle. I would show you a typical scar, but there may be children reading and they would be traumatized. (my favorite nephews Jeff "-51" Green, and the other one near the Arctic Circle.)