These are LED light hangers. The hangers that attach to the lights can clip directly onto the frame of a 10x10 camping canopy or they can clip into the trailer mounts. The trailer mounts clip onto the steel rails of a covered trailer.
I use these to support the lights I hang in my 12' covered trailer. At night, I pop them off the supports and hang them off my canopy for when we're working or sitting around under the shelter of the canopy. Great for night lights for working on Quarter Midget race cars. Easy to setup and take down.
PETG
4 Perimeters
Brim for small parts
Supports for Cable Hangers
The author hasn't provided the model origin yet.