【No Backlash,Sturdy Metal Made,Comfortable Rubber-covered Handwheel】Material: Sturdy Metal CNC Machined,New design on its inner structure to reach a high level, while the damping gives virtually zero backlash(<0.5mm).Handwheel is covered with well-made rubber,this would bring comfortability on operation especially in extremely weather as well as preventing slipping | 【Well-made Gearbox,Tightness Adjustable】Long-life precision engineered gearbox enables accurate and reliable focusing,2 levels adjustable damping.Drive gear can be mounted from both side.(Works for both right-handed and left handed),Drive Gear Interface: Compatible with JTZ X Type Interface Standard | 【A/B Hard Stops,15mm Quick-release Rod Slider】Integrated with A/B Hard Stops, stoppors can also be detached and then stored in the slots within the follow focus itself. | Multiple Gear Size for Option】Can use different size gears to meet your need with different lenses. This set comes with 3 size gears.(M0.8-38T/M0.8-43T/M0.8-65T),you can also buy extra 0.5 78T and 0.6 64T gear for extension. | 【Standard 12x12 Connection Port,Flexible Gear Belt】Work with speed crank and speed whip with standard 12x12mm connector.Flexible gear belt can be adjusted from 46mm to 110mm to be compatible with different lens.