Bought just the 7.5in file and made 35 and 30 degree blocks on the table saw. $65 is a pretty ridiculous price but you know specialty tools...
I gave it 4 stars because it's not a life changing tool. It's a file.

Expensive for what it is. Works very well.
If you are making dulcimer fretboards, get the
longer model. Short model slides off frets easily due to wide spacing of some dulcimer frets. Gave it a four rating instead of five only due to price.

Very handy tool! Makes the job of beveling fret ends much simpler. Also reduces the chance of errors.

A great tool, does exactly what it says it'll do. Watch for filings that stick to the Teflon surface as they can scratch the frets if you don't clear them off after a few strokes. Other than that a great tool.

I like this tool I use it a lot. I actually like the fact its made of plastic as it slides really nicely its a good idea, I have used them homemade out of wood but these feel great...

Nice tool and works very well.

Because of the fret radius, it is easy for the file to slide off the ends and onto the frets and damaging them, creating extra levelling/dressing work.

This is a great file, though I would like to see one with a 90 degree angle file on the opposite side.

I bought the 7 1/2" part, and while I can't see where all the money is in the thing, I gotta say it works like a charm.

I bought just the short one... mostly because the longer one was out of stock. But no need, the shorter one worked fine for the entire fretboard on a new build project.