The HD-DS65HB is a great high-performance, fast actuator for small mechanisms. It has digital electronics for improved performance. The lead is terminated with a standard “JR”-style connector, which is Futaba-compatible. The pictures below show the servo’s gear train and an example of the hardware that might be included with this servo (hardware might vary).
Note that, as with most hobby servos, stalling or back-driving this servo can strip its gears.
This servo also goes by the part numbers D65HB and HD-D65HB.