Designed around our unique on-car adjustable Nylon/Polyurethane ball-joint combination for more direct steering input and improved cornering and braking. The offset bore allows for +/- 0.33   of caster adjustment with a supplied spanner to assist the fine-tuning of the vehicle's suspension geometry. Does not fit arms K04670544AE, K04670545AE, K04877742AD and K04877743AD as fitted to US models.  Using a  Black 95A durometer  ball moulded to  an all-new offset stainless steel sleeve and  machined nylon cups,  this new and improved design maximises performance and articulation while  retaining  the benefit  of on-car adjustability.All come pre-assembled with the ball and cups encapsulated within a plated metal outer shell secured by snap-rings and now include a 27mm spanner for adjustment.