Pneumatic Rodless Cylinders (also called cylinder slides) are devices without rods that enable linear movements of loads, usually in a factory environment. Pistons fit closely into actuator tubes and move up and down against the compressed air pressure in the tubes to create the linear movements. The objects are carried to their end points via the external carriages connected to the pistons.
Simply put, these pneumatic rodless cylinders move objects, usually as part of an industrial process. They can serve as non-rotating supporting platforms to which tools can be attached too. They are also used for packaging in food processing industries where parts are picked and placed repeatedly.