Leofoto Binocular Rangefinder Rail Kit 45 cm Black. It is primarily designed for rifle sports enthusiasts to mount optics and telemetry equipment but it can also be used in other industries where a stable and adaptable accessory rail is needed. Specifications for Leofoto FDM-04 Binocular Rangefinder Rail Kit: Manufacturer: Leofoto Color: Black Features of Leofoto FDM-04 Binocular Rangefinder Rail Kit Aluminum CNC Machining Package Contents: Leofoto FDM-04 Binocular Rangefinder Rail Kit Leofoto FDM-04: FDM-04 Binocular Rangefinder Rail Kit 45 cm Black