Tranced,mine is 8mm....that's good for 2 degrees camber..BTW<I hate my hudy set up......I use a combo set up guage from my nitro tc3,and a hudy ride ht and droop blocks to set to the car up...I adjust rear toe just like I did on the tc3...stand the car on its tail,pop the guage next to the wheel,and its done..I use it for camber also,,front and back...the only thing you really need the set up for is front toe.....and I do that by eye( I remember reading in an old Vector set up book that front toe is the easiest adjustment to do by eye).....