Description: The whip speed crank can be attached in the provided square hole at the center of the wheel in the follow focus. Thus, the hand merely has to spin the rod, which turns the wheel. The micro whip allows the user to adjust focus remotely significantly reducing the risk of vibration being picked by the camera. Made of the material as heat-shrink tube and aluminum, this speed crank whip is strong enough and touch good; fit with any follow focus with standard accessory port (size:12mm x 12mm). Safety-look design at the end of termination, which ensure is not fall off the follow focus. Length: 3" Connector size: 12mm x 12mm Color: Black Specification: Material: Steel Spring, Plastic Length: 3"/125mm Connector size: 12mm x 12mm Package Includes: 1x Whip Speed Crank for Follow Focus