Neewer Black Metal PU-200 Universal Quick Release Plate Fits Arca-Swiss Standard for Tripod Ballhead (PU200 IV) 200mm in length quick release plate. PLEASE NOTE: Tripod NOT Included! Dual dovetail design, 3/8" center threaded socket Precisely engineered, Completely arca swiss compatible Material: Custom made one-piece bracket machined from solid aircraft-grade aluminum 1x 1/4" + 1x 3/8" screw mounts ( screws have D-ring and flat head screwdriver slot ), Dual Safety Stop 3mm hex (allen) Screws