MusicNomad Premium Truss Rod Wrench - 5mm for Martin Guitars (MN236)

The picture looks bigger, but it’s actually just the right size to work in the sound hole and still not be too big for the compartment in your guitar case. At first I didn’t wanna spend money on a niche tool but honestly, if you don’t want to mar the nut or struggle with some dinky allen key, this makes the job easy.

Works great for my Martin 000-10e acoustic guitar. Honestly, when I got the Martin I didn't realize it needed a specialty truss rod wrench. This has a very solid, quality feel to it. The price is very reasonable. I'd order this brand for any guitar-related gear. I have the Taylor truss tool from them as well. Also good.

Very handy.

This wrench is very well made and works perfectly on my 1989 Martin D16M. It fits securely in the adjustment screw. It is strong enough to endure the pressure without bending. It is slim enough to fit between the strings so adjustments can be made without completely removing the strings.

Excellent quality. Feels comfortable and sturdy in your hand. Does the job well on two guitars so far. Not too bulky. Happy to have the right tool for Martins for now on. Have the Allparts one for Gibsons, and very happy with that one too

It's the right tool for the job if you want to make adjustments to the trussrod and your guitar needs a 5mm wrench.There are plenty videos from the manufacturer and others on how to use this, so be sure to check those out. Small increments are the trick.Tip: before inserting this through your sound hole, cover the edge facing the bridge/saddle with a folded cloth (like an old t-shirt) to prevent any damage.In one of the videos they warn about this, but don't suggest this simple solution.

Perfect for most all Martin guitars. I like it alot. easy to insert, and easy to use.

Perfect tool to adjust a TR on a Martin. Excellent design with the rounded tip - Allen finder.