adjustable ball joints - purpose

[wrlcs]

I am about to change my ARBs and front control arms .  I often see adjustable ball joints along with the control arms particularly from Superpro.  I don't really understand the use of the adjustable ball joints and whether they are worth the cash. I have a Scirocco that is not lowered.
 

[fab5freddy]

They give you negative camber, which in turn will give you better front end grip in the corners, i have them fitted and wouldn't be without them.

Give Alex@AKS tuning a shout, he supplies the superpro