These arms are made for using Du-Bro Clevis (included). They have a insulation bushing of Delrin, NO Metal to Metal contact!! Great for Planes like Comp Arf or any others that lay the servo on it's side. SWB’s the original aluminum Double-Loc Servo Arm. These arms are not only designed to clamp around the output shaft, but they also make up for any inconsistencies in the output shaft sizes.
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