This 494 Center Ball Head with Universal Round Disc Mount from Manfrotto features an integrated universal round disc with 1/4"-20 threaded camera mount. It features a load capacity of 19.8 lb and can be attached to tripods or other support systems that feature a 3/8"-16 mount. By loosening the head's primary locking knob, the ball-and-socket joint can be quickly swiveled, angled, fully tilted, or returned to its upright position. A recessed dial set within that locking knob can be rotated to apply tension control to the ball-and-socket joint's movements. Along the opposite side of the ball head, a secondary locking knob controls the ability to rotate the head 360°.