12mm - adds +/- 1.5deg camber, Suffering uneven tyre wear? Sounds like poor alignment. Whiteline camber bolts provide the largest adjustment range (of up to +/- 1.5deg) to get that alignment back in check. Unlike other 'friction' lock designs we use a positive toothed lock washer which means NO SLIP. Simple to adjust and lock time after time with out slipping., 3 Year / 60,000Kms