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The Focus Dolly Light is the ultimate when you need to act fast. It fits together in just a few minutes, and the design incorporates dual features. When closed down, the dolly becomes a portable flight case, the push/pull handle functioning as the transport handle. The dolly track wheels simply pop-in to the sockets of the dolly. The track wheels operate smoothly on any standard steel or aluminum track. This version of the kit includes the bazooka and seat set up.