A pair of machined 4mm thick zinc plated BMW steering lock spacers. They fit in between the tie rod and steering rack to allow more steering angle. 4mm is the maximum thickness you can fit without blowing your rack seals. Your toe / tracking will need adjusting by 4mm each side to compensate for the lock washer. *Safety Warning* When using these lock spacers, we recommend use of a good quality thread lock/ lock tight.