This convenient set of 6 nut slotting files will provide you with the right gauges for cutting and shaping string slots on electric guitars. And, you’ll save 10% by purchasing the set! Our tempered edge-cut nut files produce round-bottom slots for nuts and saddles. They’ll help ensure your strings seat properly in the nut without buzzing! Each chrome-alloy steel file has twin 4 cutting edges. Among our most popular tools, these professional files help you get the job done quickly and correctly. StewMac tech advisors specify this set of 6 files to match Medium Gauge electric guitar strings (one file each in the following cutting widths: 0.010″, 0.013″, 0.016″, 0.028″, 0.035″, and 0.046″). Match the file to the string gauge. Choose a file of the same size as the string, or no more than a few thousandths wider. By rocking the file side to side, you can widen the slot to fit a slightly wider string. TIP: Nut slotting files work great for metal Tune-o-matic bridge saddles. After filing, polish the slot with abrasive cord to remove file marks.