The basic types of dulcimer tuners include covered gear, guitar tuners of 1 to 8 gear ratio.
Many players, however, prefer banjo-type planetary tuners. These are a handsome addition to the dulcimer and enhance the tuner head design, but carry a higher price.
Planetary tuners have a 4 to 1 gear ratio and come in either chrome or gold.
A third choice is Grover sealed tuners in chrome or gold. These are excellent tuners and come with a lifetime guarantee.