Polaroid's Universal Foldable Tripod Dolly gives you camera support either locked in place or rolling along when you've got a smooth hard surface to roll on. Two spring-loaded pins automatically lock the arm in place and each of the three leg clamps is provided with dual adjustments to fix the tripod leg to the dolly and to set a comfortable distance along the length of each arm. The 3" hard rubber casters will support up to 35 lb. The casters have individual foot-operated locking and release levers and the center hub becomes a convenient carrying handle when the dolly is folded for storage or transport. Lift the pins, fold the arms and store the dolly in the included carrying case. This dolly will fit most tripods. Ideal for weddings, reception halls, family gatherings, etc.