Pro Max Chevrolet 262-400 7/16-20 Rocker Arm Stud Girdles The features of the best stud girdles available, plus girdle stands. These innovative stands eliminates girdle bar rocking and all associated flex. Dyno test have shown 300 plus rpms over standard stud girdles. 100% CNC machined from premium 3/4” aluminum bar. Purple anodized for protection. The accuracy of shaft rockers with out the additional cost. Locking hex head adjusters are included. Made in the USA.