This is a rail system for small to medium sized cameras. There are 2 pieces of PVC pipe which act as the rails, 2 end pieces that can clamp into tripods or just sit on a flat surface. The slide mount for the camera can move freely without rattling around on the PVC pipe and has a lock on it to keep your camera from falling off. There are also 2 hooks on either side of the slide frame so that a pulley system can be used for a smoother video! I hope you guys enjoy this! Feel free to leave any comments or suggestions for improvements on this design!