The Dusty Duo-Tune


Duo-Tune Custom

fits Dusty Strings harps


Duo-Tune Concert

fits many pedal harps and non-Dusty lever harps


Duo-Tune Universal

adjusts to fit almost any harp


Duo-Tune Zither

for harps with zither pins instead of through-pins


Replacement Tuner Head

with reinforced joint


Spare Batteries

pack of 5


Please read the Sizing info below if you have a non-Dusty harp!

Note: We know the price of the Universal model seems high, and it's because we need to have the adjustable shaft custom-milled for us. In the past, we were able to buy an off-the-shelf product and modify it to work with the full range of harp tuning pin sizes, but it's no longer possible to find that product in the quality we need. We considered discontinuing the Universal Wrench altogether, but we know it can be a lifesaver in specific situations, so we opted to go with the custom part, even though it meant raising the price.


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 (except for Universal model) 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)

Note: The Snark tuner carries a one-year warranty against defects in manufacturing. Should anything happen to yours outside of the warranty, it is possible to replace just the tuner head without buying a whole new Duo-Tune wrench.


There are four models of the Dusty Duo-Tune to fit different sizes of harp tuning pins. The size that each wrench fits is engraved on the handle, but we realize most people don't have calipers readily available to measure their tuning pins. 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 as we get more information about pin sizes.

Custom (For tuning pins with a square tip diameter of .176" or 4.5mm. Does not work well on zither pins.)

  • Dusty Strings
  • Musicmakers (with threaded tuning pins - after about 2008)
  • McFall
  • Pierpont

Concert (For tuning pins with a square tip diameter of 3/16" or .188" or 5mm. Does not work well on zither pins.)

  • Argent Fox
  • Blevins
  • Camac (The Concert size should fit all Camac pedal harps. It fits most newer Camac lever harps, but we do hear of cases here and there where the pins are a little too large for the wrench. If that happens, it is returnable or exchangeable for a Universal, but shipping is not covered by our return policy.)
  • Fisher
  • Harps of Lorien
  • Heartland
  • Kortier
  • Lyon & Healy
  • Lewis Creek
  • Lynn Lewandowski
  • Marini Made
  • Muma
  • Musicmakers (with tapered tuning pins - before about 2008)
  • Noteworthy
  • Pilgrim
  • Pratt
  • R Harps
  • Salvi
  • Sligo
  • Stanley & Stanley
  • Starfish
  • Stoney End (except models with zither pins; see below)
  • Swanson
  • Thormahlen
  • Timothy
  • Venus
  • Webster
  • Wickford

Universal (Adjusts to fit harp tuning pins with square heads from .160" or 4mm to .236" or 6mm. Does not work well on non-square pins, zither pins, or other pins with tapered heads; please see Sizing tab on our Universal Wrench page for more details.)

  • Aoyama
  • Camac (older lever harps that use a large wooden-handled tuning wrench instead of a rubber-coated wrench)
  • Clark
  • Rees (but not Harpsicle)
  • Triplett

Zither (Fits harps that have zither pins instead of through-pins. You can tell you have zither pins if your tuning wrench goes on the same end of the pin as the string, and the pin does not stick out on both sides of the neck.)

  • Harpsicle
  • Stoney End (some models use zither pins)


7 Review(s)

  • Chris
    Sep 28, 2020
    I use the Duo Tune on my FHS36, and I like its convenience. However, after a short time, I've discovered that it doesn't pick up many of the strings unless I put pressure on the tuner head with my thumb while tuning. It's possible that it's gotten a little loose, but I haven't had it that long, so it's a little disappointing.

    Reply from Dusty Strings

    Sep 28, 2020
    That sounds frustrating, and not how it should work, ideally. I'm sorry that's been your experience. If you'd like to give us a call or send an email, we'd be happy to see if we can figure out what's going on and how to fix it! 206-634-1656 or [email protected]
  • David
    Aug 23, 2019
    The Duo-Tune Concert tuning wrench works perfectly on my Salvi Hermes harp. It is super accurate from the the very lowest string all the way up almost to the highest strings. The very highest strings need to be tuned by ear using octaves, as the pitches are too high to be registered on the built-in.
  • Steve
    Jun 7, 2019
    I bought your Concert Duo-Tune last month and love it. It is better able to isolate the pitch of the string being tuned, even for more resonant harps that sometimes "over-ride" the actual pitch of the string being tuned. And so, I'm getting another because this has quickly become my favorite!

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