MusicNomad Tri-Beam 3 'n 1 Dual Notched Precision Straightedge for Acoustic and Electric Guitars Including Fender, Gibson, PRS (MN821)

It's kind of embarrassing I've gone 30 years without setting up my own guitars, but over the past year I started getting into it… and this tool is probably the first tool I should've gotten. Knowing the actual relief in your neck determines everything you can/should do in terms of action, intonation, as well as any fret or nut work. There are other notched straight edges out there, but the fact that it covers the key scale lengths (as well as Jr, you just have to skip the first 2 frets) AND it provides a normal straight edge, is key. The price is very fair, too. No brainer. Get it. Now. You won't look back.

I got one, and it's worked great. Helps a lot with getting the intonation right.

Great tool to have! Strat or Les Paul, a well finished piece of tooling.

Straight and flat as advertised. Beautifully made tool. Checked it on a Starrett flat stone I have access to at work and it's perfect. There is a video review of this here on Amazon that shows someone laying it on a desktop, sliding a piece of paper under it and claiming the tool is not flat..... a DESKTOP. If you lay this on a desktop to gauge the flatness of it, you are exactly the kind of person who shouldn't be using a tool like this. All you did was show that your desktopis not flat. There are probably very few desktops in the entire world that are absolutely flat. If they were, we wouldn't need to buy flat stones to gauge things. One of the more moronic things I've seen in a review here and totally worthless.In short, this works. It works well and does what it says. Not really more complicated than that.

Fantastic precision notched straight edge, incredible value for the money. Half the price of Stoo-Zac with more scale lengths and still high quality. The only difference I can see is aluminum vs the other brands’ steel, which is fine as long as you don’t drop it. I stumbled upon this one because I’d previously purchased an inexpensive Chinese brand (Eye-Looz or something like that) that I suspected wasn’t machined straight and I was right. Music Nomad really makes great stuff for the money. Try their nut files too! This product is absolutely worth a 5 star rating based on value for money, however I am removing one star because Amazon shipped it in a PAPER BAG. A precision tool, shipped in a flimsy brown paper bag. Yeah take your chances there. The word precision sorta goes right out the window there, doesn’t it? How many times was it dropped in transit? Buried beneath heavier packages? It’s a real “who knows” type scenario. Fret not, for there are other retailers who offer basic competence AND free shipping. Say for instance the ones that send you your product intact along with a little bag of candy? Yeah you get the picture.

I should have bought this a long time ago! I own several guitars and basses and do my own work and set ups. This is a very well made and valuable tool. It works on many different guitar scales and has on side as a plain straight edge if needed. If you do your own set ups, get this!

Now that I have one and have seen some bad "kits gone counterfeit", I wouldn't buy a used guitar without it. Frankly, I may never buy another used guitar again. I do wonder why the gaps are as large as they are since the math is well-understood. I would like to compare this to the $$$ alternative at some point.

I am very happy with this tool. I am a private music teacher who also does setup and repair work, mostly on guitars and basses. I highly recommend getting one.