This assembly features a set of NEMA 17 stepper mounts to allow precision 2DOF motion control. The motor's shaft is fixed with an M5 16mm set screw, while the mount is attached to the base using M3-8mm screws. Ideal for hobbyist projects wanting a simple 2DOF arm test structure. This setup is likely not suitable for practical application without some modification. The files for the motor mount and base are available for download.