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 standard three-way locking base which has a separate lock for each of the three legs.U-3 Black 12' UST ColumnU-0 UST Standard Base 3-way LockingU-4 Gear-Driven Crossarm for UST