This is a tool to allow you to mark your camber positions if you have camber plates on S550 Mustangs. I have Ford Performance struts (same diameter strut top as stock) and the Maximum Motorsports camber plates. This allows you to mark the alignment using a sharpie on your strut tops so then if you want multiple settings (street/track) or just to mark where the alignment shop set it, you can easily go back to it when replacing struts.
The author marked this model as their own original creation.