The mc-125 professional studio boom stand's larger-diameter base and locking rollerblade-style wheels provide a low center of gravity and extra stability. smoothly raise or lower height from 51.5"-82.75" with a reliable clutch. long boom telescopes from 35"-61" and features a friction-free clutch arm extension. also includes a unique easy-adjust 5.75-lb. counterweight. rollerblade-style wheels travel smoothly. threaded shaft and boom sections provide quick set up and tear down for easy transport and storage.