Haoge 120mm QR Quick Release Plate Dual Dovetail and D-Ring Screw Fits Arca-Swiss Standard for Tripod Ball Head The 120mm slide-in quick release plate has a 1/4"-20 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.