This is a servo saver system for 2-56 size pushrods. It is a spring over-ride that protects servo gears from damage during hard landings (or anytime the pushrod forces the servo to move and strips the gears). This servo system mounts to the servo arm that comes with the radio systems.
Note: The screw lock connector does not use a set screw to hold the pushrod in place. It is intended for the pushrod to slide back and forth in the screw lock connector.