http://hohner-cshop.eu/cms/index.php/en/en-tuner
This video "C07 - Tuning" shows how to tune harmonica reeds using the HOHNER harmonica tuner.
The HOHNER SERVICE WORKSHOPS HARMONICA are designed to show you what a quantum leap you can make if you learn to maintain and repair your instrument yourself. Once you've got the hang of it, you will own instruments which are priceless, because they are set up to reflect your requirements as a player.