High torque precision stepper motor with 11:1 gear head. Maximum torque output is 110 in-lb and resolution is multiplied by 11 times of the motor. Wound with exceptionally low resistance and inductance, results in higher speed and torque than other manufacturers. Every stepper motor requires a controller/driver, and the Excitron controllers are designed and built to drive with high amperage. Strongly suggest our integrated powerful controllers, any other controller will not run as strong or as fast.