Designed for the micro servos associated with electric model airplanes. The 1 mm shaft diameter is applicable for all common micro servo horns. Mini-Pushrod Connector also fits standard servos. Simply push the included 2 mm brass bushing over the shaft and enlarge the servo horn hole from 1.6 to 2.0 mm. The hexagonal shape is easy to grip with pliers while securing the Pushrod Connector. Fits pushrod sizes from 0.5 to 2 mm (1/16“=1.55 mm). Includes spring steel starlocks for a secure attachment to the servo horn. Nickel-plated steel.