This is a 6 rpm motor! Why am I talking about this? Because it's not listed in the description and if you replace the motor with a lower RPM like me (4RPM), this motor does NOT have enough torque to fully close the damper. In other words, you don't get a true 90 degree damper rotation. I had to adjust the set screw in relation to the damper so that it closes fully, which means it does NOT open fully. I made this decision during installation. Yes, I adjusted the mechanical stops, but the motor still couldn't rotate the shock 90 degrees.