Plastic green cylinder wrenches are designed to open and close the valves of CGA-870-style cylinders. Wrench is designed for making accurate adjustments to an oxygen cylinder. These wrenches can quickly and effectively access and control the oxygen flow. The wrench features a sleek, compact design that makes it easy to operate, minimizing your exertion and minimizing wear and tear on your hands. This easy-to-carry tool is portable and perfect for travel.