Low profile all caster design! What makes this floor dolly unique is the adjustable post system. Posts can be used vertically to carry a variety of items including mattresses, headboards, flat screen TV’s, furniture and more without the user having to balance the load. The post system can also be used horizontally to expand the carrying base up to 86 inches for carrying boxes, pallets, sofas, desk, filling cabinets or rugs. There are 14 vertical and 8 horizontal positions.