The plate is 10mm thick D16T duraluminium, 36mm Spherical bearing (as I remember), stainless steel nuts and bushings, stainless steel bearing carier.
Mounting holes have two aditional holes each and if you want you can mount it in such way that you will get not only bigger camber, but also caster.
Design was tested on the COSMOS, and evrything should work fine with high load in serious racing events.
You will nead more camber if you building you car for racing events or something like this. Group A M3 E30 had -3 in the front, and -2 in the rear with very stiff suspension. Of course a lot depends from tires and track.