Arrma AR390103 ADS-08 Diff Locking Servo Set Nero FEATURES: Enables differentials of Arrma vehicles to be locked on-the-fly Included in the Arrma Nero 6S BLX 4WD Monster Truck 150mm servo extension lead for easy connection when servo is installed in front or rear diff case Also used as an upgrade part for Arrma vehicles that can have the diff locking functionality fitted;INCLUDES: ADS-08 Micro Servo Diff Locking Actuator Diff Locking Ring 5.9 (150mm) Servo Extension Lead;AR390103 ADS-08 Diff Locking Servo Set Nero