Features: Complete gear-driven design for slip-free and accurate movement Adjustable locking system Gear drive can be mounted on either side Quick and easy installation It offers you a fast and accurate way to focus the object It makes your shooting perfect and efficient Specifications: Fit Rail Distance: 60mm Fit Rail Dia: 15mm Dial Index Adjustment: 360° Material: mainly metal Color: Black Package included: 1 x Cameras Follow Focus 2 x Gear Belt