This wrench fits all Harpsicle® Harps and Waring Harps.
 
All Harpsicle® Harps come with a tuning wrench but just in case you loose one it's always good to have an extra wrench available. We all know how socks can mysteriously go missing in the laundry, well tuning wrenches are also very susceptible to being sucked into the land of misplaced things.