Haoge 50mm QR Quick Release Clamp Adapter with 60mm Plate for Camera Tripod Monopod Ball Head Compatible with Arca-Swiss Standard 50mm Clamp + 60mm Quick Release Plate + 3/8" to 1/4" Screw Adapter + M6 Hex Socket Screw + Wrench + 1/4" D Ring Screw for Tripod Ball Head Arca Compatible The 50mm Quick Release Clamp is an Arca-type compatible clamp with three built-in spirit level for leveling your camera on both the horizontal and vertical planes. There is a 3/8" threaded hole to mount the clamp onto a tripod, and also comes with a 3/8" to 1/4" screw adapter. M6 Screw for mounting the clamp to ballhead or panoramic head. 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 other Arca-Swiss compatible Quick Release clamps.