Arca Swiss QR Square Clamp + 2 Quick Release Plates for Tripod BallHead

Metal Clamp & 2 x 50mm Quick Release Plate for Manfrotto Arca-Swiss Tripod BallHeadFeatures:(1) Clamp with 1/4" to 3/8" Adapter:    3/8" Standard thread will fit on any standard tripod or head    1/4" steel bushing adapter (included) converts it to 1/4" thread    All metal construction    Compatible with Gitzo, Manfrotto, RRS, Arca-Swiss quick release plate(2) PU-50 Quick Release Plate:    PU-50 quick release plate for Arca Swiss Benro New generation B-1, J1 Ballhead.    Safe Screw installed in both side to prevent drop of camera by accident.    You can change the location of the screw to fit different cameras.    The PU-50 Universal Quick Release System has been designed to be compatible with other brand quick release systems.    Suitable for most ball heads.    Built with excellent materials, offering outstanding quality.    Material: Metal Alloy    Color: Matt Black    Width Bottom: 38mm (universal width of Arca-Swiss Standard QR plates).    Thickness: 8mm (universal thickness o