Haoge 200mm QR Quick Release Plate Dual Dovetail and D-Ring Screw Fits Arca-Swiss Standard for Tripod Ball Head The 200mm slide-in quick release plate has 1/4" & 3/8" connecting screw and two safety stop screws for Cameras, Ballheads, Panorama Head and other Arca-Swiss compatible Quick Release clamps. With 39mm AS standard interface, compatible with all Acra-Swiss Style quick release platforms.