Ohpan Mini Ball Head with Lock and Hot Shoe Adapter Camera Cradle This ball heads can withstand heavy loads, lock solidly, and move smoothly. Aiming and horizon leveling can be accomplished as one instinctive motion, and rigid lockup takes just a quick twist of one control Using this tripod ball heads are also much easier to carry and pack than tripods with pan-tilt heads?no long, protruding handles. Screw Mount: 1/4 Panoramic Rotation: 360, Plate size: 3.5 cm diameter