This is Kimbrough"s Servo Saver that is Used for Futaba Servos. FEATURES: White Nylon/Plastic Molded Components. Made of Futaba Servos with 25 Splines. INCLUDES: One White Plastic Servo Saver One Mounting Screw. COMMENTS: Servo Savers help reduce stress on Servo gears. They are most often used for high-stress areas such as Steering. 10-22-98kzh ir/jl