This NEMA 17 Stepper Motor Mount attaches to the face of your motor and provides mounting holes (both 6-32 threaded and #6 thru-hole) on the Actobotics 0.77" pattern. Being able to attach the motor aligned with the ½" hole of a channel or bracket gives you a good start to the assembly you want to put in motion. The NEMA 17 mount comes with (4) M3 x 6mm pan head screws to fasten the motor to the mount.