Linear guides or linear rail slides are support devices that are used to help carry loads and ensure straight and level linear motion. Linear guides usually consist of two components, the sliding carriage and the rail. The sliding carriage is the element that moves along the rail and supports the attached load. The design of the sliding carriage and the rail will depend on the style of the linear guide. The two most common styles of linear guides are the sliding contact guides and roller bearing guides. Linear guides are used in a wide range of industrial and manufacturing applications.