This model was designed to help increase the reach of the GPU support provided bu ASUS for their TUF RTX4080 graphics card. In a full tower E-ATX case, one may find that the GPU sits high enough off the bottom plate that the stock support doesn't reach the GPU.
This support is designed with slots for 2x 10x3mm magnets to help it attach to both the support arm (which includes a magnet) as well as the chassis.
The author marked this model as their own original creation.