By far the best value available in a heavy-duty studio stand, the UST combines rock-solid construction with smooth, counter-balanced movements. A gear-driven crossarm travels 11/2' in each direction for precise camera positioning. This kit features a Single-action Base which has a convenient foot pedal that locks down all three legs in a single stroke.U-3 Black 12' UST ColumnUCB Base with Central BlockingU-4 Gear-Driven Crossarm for UST