The components in this ARRI CLM-3 Motor Basic Kit are used with an ARRI motor controller (available separately) to remotely control your lens's focus, iris, or zoom function. The robust CLM-3 motor features strong yet fast control, working well even with heavy lenses in low temperatures. This CLM-3 Motor Basic Kit can be used with ARRI's UMC-4 Universal Motor Controller or SMC-1 Single Motor Controller. The included drive gear works with select cine-style lenses, and can be attached to either side of the CLM-3 Motor. This kit includes a motor-to-controller cable, and a bracket with insert for mounting to a standard 19mm or 15mm rod.