This wooden tuning key (wrench) fits harps with zither-style tuning pins (see photos below), such as all the harps made by the Harpsicle Harp Company (Harpsicle®, Sharpsicle®, Flatsicle®, Fullsicle® and Grand Harpsicle®). Zither pins are tuning pins that do NOT go through both sides of a harp neck. (See photo.) This wooden handled T-shaped key is much more comfortable to use than the L-shaped key that often is used on these harps. The inside end of the metal shank has a star shape to fit on the zither pins.