MusicNomad Premium Spanner Wrench (MN224)

I have a similar non-name tool, but hesitated to use it because the metal scratches. The Music Nomad version has a soft pad to install underneath to protect the finish. The machining is also superior to my generic one, and it grabs Gibson toggle switch nuts perfectly. Now I don't know how I got by without it.

This is a great and very practical tool to tighten loose nuts in a pinch. Its thin profile allows it to easily fit under knobs and strings. I like the fact that it comes with a felt backing, though it is possible to scar the instrument if you are not careful, I did when using it in a hurry.
The price is a little steep but the quality is excellent and it can be a lifesaver.

The primary reason why I bought this spanner wrench is the protection under it, which prevents damaging the surface of the guitar. I use it primarily to adjust the bridge on my Les Paul. I also use it to tie all the other nuts. So it is very useful.

For professionals and amateurs. If you like guitar maintenance, it's something worth buying.

A classic tool for tightening and unscrewing all the unconvinient things on your guitar.

Soft surface of the bottom is a nice touch, protecting the finish of your guitar.

Everybody should have one of these if they play regularly.

I recommend this tool for all guitar owners. Very handy and useful.