The HP Tools Sag Scale is a necessary tool when setting the race sag of your motorcycle's suspension. The folding design helps you carry it easily in your toolbox to the track and trail, or store nicely in the garage. The sag scale is listed in millimeters and inches for your measurement preference. Set sag of the rear shock correctly and accurately. Made from 6061-T6 aluminum. Anodized body with laser-etched markings for a clear reading. Scale shown in millimeters and inches.