The Miller HD Dolly for HD Studio Tripod provides a stable platform for smoothly rolling your tripod along a studio floor. The three dual ball bearing wheels let the dolly quickly swivel as necessary, while the robust design can support payloads up to 440 pounds. Each wheel has a cable guard to push cables out of the way rather than roll over them, and an axle brake for quickly latching and unlatching for camera movement. Wheels can be repositioned and locked to carry out linear or radial movements. When not in use, the HD Dolly can be quickly folded and transported via the built-in handle.