Designed to work with the Spartan Davros Heads and Ascent tripods, the Phone Holder enables you to take hands-free photos or videos in the field. It includes a Light duty optics adapter for attachment to Spartan systems.Precision FitFeatures a rapid-width adjustment with a secure clamp lock, plus a fine-tuning wheel for a perfect fit. It accommodates phones from 59mm to 94.5mm wide.Versatile MountingNative Arca-Swiss compatibility and standard 1/4-20" & 3/8-16" threads ensure it fits almost any camera tripod or optic setup.Superior GripEquipped with silicone inwards V-clamps to ensure maximum purchase and protection for your phone during use.FeaturesDual-Action AdjustmentModular OrientationUniversal Optics Integration SpecsWeight: 74g / 2.6ozWidth Adjustment Range: 59mm to 94.5mmPrimary Mounting: ARCA-Swiss (Female)