Adapter to provide a secure base for Garmin's Varia Vision HUD when attaching them to Rudy Project Rydon glasses. The HUD requires a flat mounting surface for stability; the RP glasses have an highly angular edge.
This provides both left and right hand options - for the glasses arms are not quite symmetric.
This works for me - and is offered on an "as is" basis. I will not be modifying this to suit you! caveat emptor.