Like any other instrument, a Hohner harmonica needs proper maintainenance. Reeds and valves (on chromatics) will eventually show signs of wear and tear. For the ambitious player it‘s really a must to have the right tools at hand. The Hohner Harmonica Service Set contains everything you need to tune and adjust reeds and replace windsaver valves.With a little practise you will find that it‘s quite easy to adjust reeds which are clipping the slot or remove foreign objects which are blocking the reed. The blade can be used to adjust reed offsets to suit your playing style and you can use the file and scraper to retune reeds which have gone out of tune, as they eventually are likely to do.