Nice! Who makes it?

-Gregg

Thank you for showing this. Looking at the picture it showed me an obvious solution to a small problem. The key shown appears to be a handle made to fit a central heating radiator bleed key, it’s probably a lot more than this 🙂 . I never throw any components away, so I have had 30 tuning pins recovered from an old harp made in Pakistan which unfortunately was too far gone to repair, so I stripped components and put them away for another day. Unfortuately the tuning pins have a non standard square head, which is either too tight or loose for the Camac, Dusty and Musicmakers keys i have in the workshop. Seeing this picture I tried a few radiator bleed screw keys and one of them fits perfectly. Problem solved.. It’s not a big job to make a handle as shown…
Why I hadn’t thought of this myself I don’t know, sometimes it takes a photo to give you an idea..
Just one thing I would always recommend using the correct key from a reputable maker, seeing burs and wear on tuning keys is not good for expensive instruments like harps.
This photo has solved my small dilemma, so many thanks….

Dusty Strings makes a Universal Tuning Key:

https://manufacturing.dustystrings.com/products/universal-tuning-wrench