Servo saver to fit the RCD/Hitec brand servos. A servo saver is mounted to the servo output shaft (normally where the servo horn is attached), and contains a spring mechanism that gives way slightly in case of binding. It is mostly used on the steering servo for R/C cars and trucks, and basically saves the servo gear train from stripping
Specs:
Diameter: .687"
Length: 1"
Thickness: .312"