Hosco double edged nut slotting files are massively popular the world over, this set is made up of thicker gauges for bass guitars (although the most of the gauges would also be useful for the thicker strings on 7 and 8 string guitars) and is made up of the following widths: .045"/.085", .065"/.105" and .075"/.130", having specific file edge widths makes slotting nuts considerably quicker and easier. Slightly wider slots can be made by rocking the file from side to side when filing the slot.