Ultra-Pure Linkage, Lever and Key Oil is an excellent oil to use on rotary valve mechanical linkages, triggers, keys, levels and more. The synthetic, non-toxic and odorless oil is long-lasting and easy to apply; if your bearings and valves are slightly worn or leaky, this key oil can be used by simply applying a few drops down the slide tubes. A handy key oil to also be used for woodwind instruments such as saxophone, clarinet, flute, oboe and more, this Ultra-Pure product is a versatile product indeed.