The hook can be used to mount accessory on the backside of an LG OLED TV. The hooks was created for an LG OLED C8 model, but may fit for other models as well.

The base model is without any devices specific mount on the other end. Download the file and extent it yourself for your specific accessory.

Two of the single 6mm version are used for a NetGear network switch.

The double 5mm is used for some arbitrary Raspberry Pi case.