The DSC-C adjusts the operation speeds by controlling the compressed air that is sent to extremely small air cylinders. Conventional screw-type needle valves require seasoned professionals to make adjustments. However, novices can visualize the adjustments and quantify the flow rates with CKD's revolutionary dial-with display, contributing greatly to reducing workload. The dial is not only visible on two sides, but each increment during rotation can be felt and heard, and so with an easy to grip form and markings that can be aligned, adjustments have never been easier.