This model has gone over several iterations and this is the final form. It does need a brim.
It is a headphone hook designed to go over the top of a monitor without covering up anything on the screen by taking advantage of the bezels' thickness. There are also a variant with a hook to hang the headphone cable from. Along with another variant designed to be able to be mounted to your keys and allow for easier transport.
There are eight different variants of the hook. Hooks 1 - 4 are intended for thicker monitors, while hooks 5 - 8 are intended for thinner monitors.
The author marked this model as their own original creation.