Lang Neckbearing Adjustment Tools for Harley-Davidson® Motorcycles is designed to adjust the neck bearing if necessary. The neck bearing adjustment is usually checked at the following service intervals: 1,000 miles, 5,000 miles, 15,000 miles, 25,000 miles or annually. Lang Neckbearing Adjustment Tools feature tapered ends that allow easy access to the neck bearing adjusting star on Harley-Davidson® front ends, and a screwdriver-style handle offers a comfortable grip.