Which Is The Better Nut File? StewMac DiamondCut vs

I saw a YouTube video, where a guy gave two options to cheaply but accurately file nut slots 1 ) Cut little notches in the edge of a feeler

Guitar Nut Files · 13 Sizes Guitar Nut Slotting File Saw Rods Filing Repair Tool Luthier Kit Bridge · 4 String Bass Guitar Nut Files 45-105 Gauge

nut slot files Hosco Gauged Nut Slotting Files Set Hosco gauged double edged slotting files allow precise slotting of nuts, Tune-o-matic saddles and acoustic

nuts and bolts slot Guitar Nut Files · 13 Sizes Guitar Nut Slotting File Saw Rods Filing Repair Tool Luthier Kit Bridge · 4 String Bass Guitar Nut Files 45-105 Gauge