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.

 Half arms are measured from the servo screw hole to the outside hole.

Full  arms are measured from the servo screw hole to the outside hole, 2X

Example” 1-1/4 Full arms are 2-1/2” from outside hole to outside hole.

Hole spacing:

1" & 1-1/4" Half arms  .11

1-1/2" & 2' Half arms .25 (1/4")

1-1/4", 1-1/2" and 2.25 Full arms .25 (1/4")

Offset arms are designed to be used with a rudder horn of that length and crossing the wires

Example:  3” offset arm is to be used with a 3” rudder horn

Pictures may vary from actual item