This is a Dolly XL by Sachtler. It is specifically designed for use with OB 2000 tripod. The Dolly XL provides smooth and stable dolly action for the OB-2000, OB-2000M and Cine 2000 tripods. Features fast-action foot-operated brakes, adjustable cable guards and is fitted with track locks to provide tricycle steering.
A collapsed length of 28.0" enhances portability, while the ergonomically designed carry handle is molded into the dolly's reinforced center bracket for optimum carriage strength.