These mounts can be used to affix strobe lights to your drone for greater visibility and to meet FAA nighttime flying requirements. They were designed for the Firehouse Arc V strobes lights, but could also be used for anything of similar size. Attach using Velcro style straps (my preference) or zip ties. You can use either one by itself or both together. The smaller fits on top and larger on the bottom. The mount slots are ½" wide. This should be easy to remix for similar sized drones.
The author hasn't provided the model origin yet.