The Kessler CineSlider� is a heavy duty portable mini-dolly / linear slider system for camera rigs weighing up to 80 pounds. Weighing in at only 12 pounds, with a length of 60.5 inches, 5 inches wide, and a total camera travel distance or 51 inches, the CineSlider is a very portable solution to get those quick, smooth short-run dolly movements, without having to transport a large dolly system. Features include drag control and locking, handle with adjustable arc diameter for ultimate movement control, smooth rolling precision stainless steel ball bearing Delrin wheels, and multiple mounting options.Due to the length of the 5 foot CineSlider�, you will need to support the unit on both ends with tripods, lights stands, etc, or set it on a flat surface. Do not center mount the 5' Long CineSlider on a tripod. Both ends must be supported. If setting on the ground, we recommend the Outrigger Feet for the best support and stability.