1In macro shooting, more precise adjustments can be made 2Fine-tuning the focus of close-ups, reshoots, and others can be more precise 3It will be more stable and light to use when open up it 4There are two screw holes at the bottom, UNC1/4 and 3/8 for general useFeatures:In macro shooting, more precise adjustments can be madeFine-tuning the focus of close-ups, reshoots, and others can be more preciseIt will be more stable and light to use when open up itThere are two screw holes at the bottom, UNC1/4 and 3/8 for general useSpecification:Brand: KingjoyColor: blackMaterial: aluminum alloyForward and backward move range: 65mmRight and left move range: 30mmWeight: Approx. 835gPackage List:1 x Rail slider1 x Spanner1 x Hexagon wrench1 x Manual