Made of 7075 aircraft aluminum for maximum strength.the spline is a
hardened steel insert for super long life. 25 spline
Fits Savox, Futaba, Radio Post servos.
Please be aware that the fit is sometimes a little snug if you are putting
this unit on a used servo.
If you experience this you may have to put the unit on and off a few times
to get the splines on the servo to free up and
Conform to the steel insert.