Dynamite's precisely Machined Aluminum Servo Arms offer maximum steering control, as well as instantaneous throttle and brake response by eliminating the flex often associated with nylon and plastic servo arms. These 1/2 arms are drilled and tapped for 3mm-linkage hardware. Sold one per package and available in four colors, they are available in both JR/Airtronics/KO and Futaba versions.->