B00EHCA926 Fotga DP3000 M3 Quick Release Follow Focus for Matte Box 15mm Rail Rod Rig Nikon Canon Sony DSLR Cameras

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Quick-Release Version, easily attached and detach,Material: Aluminum Alloy, Plastic
There is an improvement on its inner structure to reach a high level in this field, the Dampened gear box, which permits much less backlash(even zero backlash),even better than most follow focus on the market
The gear wheel on it can be detached and installed in both sides,which makes it suitable for both left-hand and right-hand photographer. The connection mount to the gear wheel is not only the newest version but also the last upgrade version
The white mark ring is made of magnet material. It can be detached or attached easily and quickly from the follow focus. You can also buy additional mark ring.There is a release button on the side which can easily locate the focus