C Sparky,
These are also referred to as "industrial covers". They are the raised cover that a device (recp in this case) screws to the backside of. Used for surface work. They're not approved for grounding path. In the case of duplex recps, they should have holes and screws for the device to be mounted by the yoke,and not just the screw meant to hold on a cover plate.
By loop, I believe we all meant a piece of wire long enough to be cut and spliced into later, not a little "coil" in the box.
