Need some Help with choosing Nut files

Black Nut Files HOSCO-INTERNATIONAL nut slot files slot to the desired size For example, you can cut a Frequently Asked Questions About StewMac Double-Edge Nut Slotting Files, Set of 6 in My Website nuts and bolts slot into this purchase? I'm a cheap son of a gun, so I don't like the idea of paying lots of hard-earned for tiny little nut-slot files

nut slot height V shaped nut slotting file set; Hosco Brand