If you only want to round the fret ends, this is the only specialty tool you need. You can use sandpaper on a sanding device if there are sprouts that you need to get flush. If you're interested in the rest of the level, there are a couple more tools. You might also want to get ahold of a pos neck to practice on first.
Trust me when I say the Gurian stuff doesn't work as advertised, and costs way too much.
I've made a mint with the StewMac file in the last 5 years, and it's much more affordable. It's all in the technique, rolling your wrist while filing gently.
I use a triangular file with safe edges ground in. Just like the StewMac version, but I made mine 25 years ago. It makes fast work of removing sharp corners.
I use a triangular file with safe edges ground in. Just like the StewMac version, but I made mine 25 years ago. It makes fast work of removing sharp corners. I also use that for crowning frets.
My industrial training was as a tool and die maker, and the first tool I was taught to use was a file. Now I own close to a hundred different files in various sizes, forms, and uses - plus several sets of specialized die sinker files and rifflers. Some of my sets are over 30 years old and cost hundreds in 1980's money. No Chinese stuff - lots of American, Swiss, and German made stuff.
Files are definitely my first choice of tools in luthiery - before drills, knives, and saws. I have modified many of my files for specific jobs, and have had custom files made for my shop. Made a lot of money with them, no regrets.