Haoge QR-60II 60mm Metal Universal Quick Release Plate Fits Arca-Swiss Standard for Tripod Ballhead Panoramic Head Ball Head Clamp The 60mm slide-in quick release plate has a 1/4"-20 connecting screw and two safety stop screws for Cameras, Ballheads, Panorama Head and clamps. With 39mm AS standard interface, compatible with all Acra-Swiss Style quick release platforms. Compatible with a variety of digital cameras. Two safety stop screws in both side to prevent drop of camera by accident. Special anti-slip rubber pads enhance the grip between each plate and the mounted gear, and protect the gear from any damage due to mounting.