Nicholson has been making high quality, industrial files since 1864., Files are made of high grade steel for longevity. , Precision cut teeth ensure fast material removal and highest performance standards., Special hardening process to ensure that teeth remain sharper for longer., Rear taper on file handles allows your hand to lock securely around the handle, increasing push force., Set comes in hard wearing zippered carry case., Set includes Flat bastard, half round 2nd cut, round bastard, Millsaw bastard, square 2nd cut,