Excellent set of Files For Acoustic Guitar Steel String, 3 Double Edge Nut Files for cutting string grooves in Nut, THIS IS A MUST for Shops Building, Repairing, changing nut,  3 Double side nut file set for 6 string Acoustic Guitar, TL-NF3A .016/.042, .026/.050, .036/.055,  Plastic Delivery case is furnished to avoid damage to cutting edges of tools, not intended for use as a carrying pouch, A product of Hosco Tools Japan, Sold and shipped from USA violinwoodworkshop  Kinder, Louisiana 70648