The Dusty Duo Tune

duo tune harp wrench and electronic tuner in three sizes
Custom, Concert and Universal Duo-Tunes
duo tune harp wrench and electronic tuner in three sizes
Duo Tune combination tuning wrench and electronic tuner in use
packaging for Duo Tune harp tuning wrench and electronic tuner in one
Custom duo tune wrench fits Dusty Strings harps
Concert Duo Tune wrench fits most pedal harps
Universal Duo Tune wrench and electronic tuner adjusts to fit any size harp tuning pin
Tuning wrench holder with Dusty Duo-Tune

The Duo-Tune is a tuning wrench with attached electronic tuner, so everything you need to tune your harp can be held in one hand!

Save $5 when you order the Tuning Wrench Holder and any harp tuning wrench together! (Coupon applied in cart.)


maple handle, fits Dusty Strings harps and some others



maple handle, fits many pedal harps and non-Dusty lever harps



bubinga handle, adjusts to fit almost any harp (due to export regulations, wrenches shipped outside the U.S. will be made of maple)


Spare Batteries

pack of 5


Replacement Tuner Head

with reinforced joint


Tuning Wrench Holder

keeps your Duo-Tune close at hand


See sizing tab to determine which wrench will fit your harp, or call us with questions.

Tuning a harp typically requires an electronic tuner, a clip-on tuner pickup and a tuning wrench (as well as a certain amount of coordination!). We do a lot of harp tuning at Dusty Strings and this awkward process was begging for an improvement. We've now combined our harp tuning wrench with the Snark clip-on electronic tuner to make a single handy tuning device, the Dusty Duo-Tune. Now you can pluck a string with one completely free hand while the tuning wrench and electronic tuner are in your other hand picking up the vibrations through the tuning pin, displaying the note on the attached LCD screen, and allowing you to adjust the pin - all at once. No more juggling tuners, wires, clips and wrenches and wishing you had three hands!


  • The same elegant and ergonomic hardwood handle as our Custom Wrench
  • Colored LCD display is readable in the dark
  • Swivel joint allows you to turn on and adjust the angle of the display with your thumb while tuning
  • Star-tipped wrench (Custom and Concert models) seats itself on the pin with less fussiness than a square-tipped wrench requires
  • No need for a clip-on tuner pickup. The string's vibrations travel directly through the tuning pin to the Duo-Tune, which means that it picks up notes accurately up and down the whole range of the harp without interference from other room noises.
  • Snark tuner has a nifty built-in visual metronome feature as well as pitch calibration and auto shut-off after two minutes
  • Battery is included, as well as a spare (3-volt #CR 2032)
  • Comes nicely gift-boxed

Note: It is possible to replace the Snark tuner head on an existing Duo-Tune, and we have reinforced heads available if anything happens to yours. The Snark tuner carries a 1-year warranty against defects in manufacturing.

Harp Tuning Wrench Holder

Click for more details about the Tuning Wrench Holder

There are three models of the Dusty Duo-Tune to fit different sized tuning pins. The size of the tuning pin that each wrench fits is engraved on the handle, but we realize most people don't have calipers readily available. So here is a list (to the best of our knowledge) of harp makers and the size of wrench we expect will fit their harps. Unfortunately, we can't make any guarantees, and current harps may not necessarily have the same tuning pins as older harps by the same maker. We do our best to add to this list when we get more information!

Note: Standard harp tuning pins go all the way through the neck of the harp and stick out on both sides. Some harps (Harpsicles are a good example) use zither pins instead, which only stick out on one side. Our harp tuning wrenches will not work well with zither pins, although our hammered dulcimer wrenches will!

Custom Duo-Tune (For tuning pins with a square tip diameter of .176" or 4.5mm. Has a maple handle.)

Dusty Strings Pierpont

Concert Duo-Tune (For tuning pins with a square tip diameter of 3/16" or .188" or 5mm. Has a maple handle.)

Argent Fox Pratt
Blevins R Harps
Camac Salvi
Fisher Sligo
Harps of Lorien Stanley & Stanley
Heartland Stoney End
Kortier Swanson
Lyon & Healy Thormahlen
Lewis Creek Timothy
Lynn Lewandowski Venus
Marini Made Webster
Muma Wickford
Musicmakers Pilgrim
Noteworthy Starfish

Universal Duo-Tune (Adjusts to fit tuning pins from .160" or 4mm to .220" or 5.6mm. Does not work well on zither-type harp pins; see note above. Has a bubinga handle.)

Aoyama Rees
Clark Triplett