Filing nut slots on my own: bad idea?

> Products > Luthier Tools > Nut & Saddle work > Black Nut Files Black Nut Saddle Slot Files Head & Fingerboard work Step Drill Bits · Jewelers Saws

These Nut Slot Files cleanout and level the bottom of nut and saddle slots Features: 2 cutting faces along the long edges; Rounded ends and safe, smooth and

nut flush in poker Guitar Nut Saddle Polishing Grinding Guitar Files DIY Slotting File Kits Set Guitar File Kit Set Dual Cutting Edge Luthier Tool Free shipping over US $10

nut flush draw poker It has 8 different measurements Files, all of them of high precision for cutting strings slots at Nut and Saddle, providing a very clean and precise cut