The Kessler Second Shooter High Torque 500 Series Motor is a fixed-pulley add-on motor for Kessler Second Shooter motion control systems like the Kessler Second Shooter Plus and Kessler Shuttle Dolly Kwik Rail Kit w/ Motion Control. Designed with cinema camera shooters in mind, the 500 Series motor can be used for inclined and vertical slider moves with rigs that weigh up to 50 lbs. Please note that this motor does not have an interchangeable pulley so your camera moves will be limited to approximately two inches per second.