Coupling kit with six different couplings for use on freewheels.

1> TT motor plastic shaft
2> N20 motor (Φ3, D-axis)
3> SG90 and MG90S servo
4> 25T steering gear (standard 945, 945, 996, S3003 series)
5> 25 motors, etc. (hexagonal copper couplings Φ3, Φ4, Φ5 D-shaped motor shaft)
6> LEGO cross shaft