The Light Widow FIZLock is an articulating FIZ motor mounting arm / dogbone that allows for fine-tune positioning and engagement of the motor to the lens. This makes it so a user can quickly disengage the motor by just a few millimeters for an easier lens change, and then re-engage without having to re-position the motor. It also allows the motor to be engaged with added pre-load, making it easier to position high-torque motors so that there is no possibility of the gears disengaging during use. The FIZLock is compatible with any motor system that uses 15mm or 19mm rod mounting, including cForce, Preston, Teradek, Tilta, and DJI.