The Davis & Sanford W4DS Professional Spreader Dolly is a universal, heavy-duty tripod dolly that supports most tripods with dual spiked feet and many with rubber feet. It works with all Davis & Sanford models except tabletops and the Connex, and it's ideal for use with the ProVista 100 and Pro Elite Video Series models. It attaches under a tripod with a few quick steps, and it easily folds to 9" x 24" for compact transport.
The maximum weight supported is 85 lb. The wheels are designed for heavy-duty use, featuring a 4" diameter and a wide tread, and they're equipped with step-on breaks that lock and unlock movement. The dolly weighs 9 lb and adjusts to up to 32" in diameter.