Nylon or Brass screw fit lower steering bush. The nylon bush is great for road cars and a once only fit that will remove all the play in the column for years to come. Unlike the the plastic bushes this nylon bush will not be cut by the bulkhead so will never need changing and always give positive steering shaft location. The brass bush is a heavier duty version designed for competition vehicles with wider tyres and heavier steering loads. This bush is a direct replacement to remove the play in the standard rubber or plastic bush.