Loosen the knob and pull out the center column so that the center column can be used as a monopod. -【28mm Large Ball Head】28mm large ball head ensures the stability; The non-oil damping new design allows the camera to rotate smoothly and accurately; With a 360-degree scale at the bottom of the ball head, it's easier to take panoramic photos and gives more stunning effects than the ultra-wide-angle lenses.【 NOTE】For a camera with a telephoto zoom lens, you need to buy a tripod mount ring additionally or a telephoto lens bracket for better balance. -【Powerful & Quick Flip Leg Lock】Lightweight Aluminum Tripods With powerful and quick flip leg lock, only use one hand can open and close all the buttons in a few seconds.