can it tune Steinway Grand piano?

I used it on my 1913 Steinway.... but, it's really a bit short to get enough torque/accuracy...

Does it work with yamaha

I don't know, but it doesn't work on my Young Chang piano. :-(

Does this work with Melody Harp for children?

the tuner hammer fitting is the size of a simple 1/4 inch drive socket

Will this work with an Autoharp or dulcimer zither pins?

If the pins are like piano tuning pins then ya. But I’m not really sure

L Shape Piano Tuner Spanner Professional Wrench Square Shape Tip | Desertcart Saint Vincent and the Grenadines

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Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎹 Tune Like a Pro, Anywhere, Anytime!

DURABLE STEEL CORE - Hard steel shaft ensures long-lasting abrasion resistance and reliable performance.
ERGONOMIC L SHAPE HANDLE - Optimized 16cm length and 10.5cm handle for maximum leverage and comfort during tuning.
TRUSTED BY PROFESSIONALS - Ranked #114 in Music Tuning Accessories with 4.4-star reviews—join the expert community tuning smarter.
COMPACT PORTABLE DESIGN - Lightweight 78g tool fits effortlessly in your toolkit or pocket for on-the-go tuning.
PRECISION FIT FOR GUZHENG MORE - Engineered to perfectly match quadrilateral tuning pins for flawless adjustments.

This L-shape Piano Tuner Spanner is a precision-engineered wrench designed specifically for tuning guzhengs and other instruments with quadrilateral tuning pins. Crafted from abrasion-resistant steel and engineering plastics, it features a 0.65cm inner bore and a compact 16cm length for ergonomic handling. Lightweight and portable, it’s a trusted tool favored by professionals and hobbyists alike, ensuring accurate and effortless tuning wherever you go.

Specifications

ASIN	B01DZR6TEU
Best Sellers Rank	#7,192 in Musical Instruments ( See Top 100 in Musical Instruments ) #114 in Music Tuning Accessories
Body Material	Engineering Plastics, Steel
Customer Reviews	4.4 4.4 out of 5 stars (843)
Date First Available	April 8, 2016
Item Weight	2.46 ounces
Item model number	ONW0020
Material Type	Engineering Plastics, Steel
Package Dimensions	8.19 x 4.41 x 0.87 inches

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