Crane shaft-type rocker arm adjusting screws are precision machined from premium steel billet material and selectively heat treated to provide maximum strength. These screws are extremely lightweight and drilled for oiling when necessary. Review products and applications. Rocker Arm Adjusting Screws Set/16 66770AS-16$46.40 Rocker Arm Adjusting Screws Set/2 66770AS-2$5.80 Rocker Arm Adjusting Screws Set/16 99680-16$43.20 Rocker Arm Adjusting Screws Set/2 99680-2$5.40 Rocker Arm Adjusting Screws Set/16 99780-16$41.60 Rocker Arm Adjusting Screws Set/2 99780-2$5.20 Rocker Arm Adjusting Screws Set/16 99802-16$41.60 Rocker Arm Adjusting Screws Set/2 99802-2$5.20