Guide rail
A guide rail is a device or mechanism to direct products, vehicles or other objects through a channel, conveyor, roadway or rail system. Several types of guide rails exist and may be associated with: Factory or production line conveyors Power tools, such as table saws Elevator or lift shafts Roadways and bridges (in this context sometimes called guardrails) A central rail that guides the rubber tired train of a rubber tired metro == Factory guide rail == Most factories use guide rails convey products and component parts along an assembly line.