These arms fit the Futaba small wheels. The 2 slotted mounting holes allow for slight radial adjustment for 90 degree pushrods. The inside mounting of the carbon arms result in a more perpendicular pushrod.

Only 2 pilot holes, no slotted holes are needed because of the recess that makes it concentric with the small wheel. Once 90 is set use the pilot holes and drill into the plastic wheel and screw together.

Perfectly spaced at 29mm for the aluminum bellcranks

Package includes:

3 x servo arms  
6 x m2x9 screws
6 x m2 nuts