Excellent set of 10 Nut/Saddle files, for most Guitars, Electric and AcousticGuitars , Mandolin, Banjo, and Violin, this is the standard 10 set +1 to include more instruments, Cut String grooves, This is a product of Hosco Japan, SIZES; .010,013,016,024,028,032,036,042,050,056 Sells and ships from violinwoodworkshop  PO Box 594 Kinder, LA 70648