Perfect, as the same!!

Used a 12" square to check relief for years. So glad I decided to give this a try. It's much more accurate because it spans all of the frets on the fretboard. Also useful for checking fret height on all of them at once.

I've tried buying lower priced straightedges and rulers. They just didn't do the job well if at all. I bought the 18 inch straightedge and love using it. Nice sturdy weight and thickness. Nice beveled edge, very precise. I like using this to check neck relief between the D and G strings. Brings a whole new meaning to precision reading.

The 18 inch will perfectly cover all of the frets on a fender scale. This is a must to get your neck perfectly straight before you start leveling frets for a full dressing. Go with the 12 inch for an acoustic guitar. These straightedges are well built.

I use these every day, on every set up. excellent quality, good weight to them as well.

I bought to my work and was the best choice

Work well

Any time you change the guage of your strings or let your guitar sit for and extended period of time, you could run into trouble with the neck having a hump or a bow in it. With this tool at the 12th fret in playing postion, you can easily tell if you need a truss rod adjustment.

Thought checking/setting neck relief was done enough by holding 6th string at 1st & 14th frets, then tapping at 7th fret and all would be well. My Taylor acoustic wasn't sounding just right lately and intonation was off, unusual for this 1998 414-KCE. Neck seemed fine, new strings didn't help so I ordered this Precision Straightedge. I held my guitar in playing position per StewMac instructions, laid the straightedge across the frets and found there was a bit more neck relief (gap) then I thought. I tightened the truss nut 1/2 a flat, checked again and relief (gap) was barely visible. I gave the guitar and strum and was surprised how much better is sounded. Up and down the neck, capo'd whatever... my 414 was back to its old self. I could not believe what a difference this "little tweak" made (I had always used "full nut flats" to measure tightening or loosening the truss rod - never occurred to me half would make a difference). I'm a believer now

To be honest, I wasn't sure about paying such a high price for a straight edge, but I'm glad I finally did! This is probably THE most used piece of equipment in my process. It's invaluable to know that what your straight edge says is straight IS straight. Its just heavy enough, and the beveled edge makes it easier to mark with precision when needed (its always needed) A+