I'm not a huge guitar techie so this is my first time replacing a nut and using a nut file. Not cheap (especially given that i'd ideally have a few more of these in various sizes), but I bought this one to use to slightly increase the size of the E A D slots (for higher guage strings), and it seemed to do the job nicely. Looks and feels nice, too. If / when I buy more of these (in other sizes) in the future, I'd be happy to buy them in the same brand / set.