Features: Suitable for most ball heads. Safe screws installed in both side to prevent drop of camera by accident. You can change the location of the screw to fit different cameras. This Quick Release L Plate System has been designed to be compatible with other brand quick release systems. Built with excellent materials, offering outstanding quality. Compatibility: for All Arca-Swiss standard quick release plates, including Benro / Arca Swiss / Acratech / RRS / Kirk / Wimberley. Specifications: Material: Aluminum Alloy Color: Matt black Mounting screw diameter: 1/4" (the screw size that connecting the QR plate and camera) Item size: 110 * 39 * 75mm / 4.3 * 1.5 * 3.0in Item weight: 95g / 3.5oz Package List: 1 * Quick Release L Plate (Camera and ballhead are not included)