This is an assortment of 6 buff files in a fitted plastic case.  Due to their hard coating, these files have a much longer durability than all other current tools.  They will not break like Degussit stones nor will they oxidize.  Titanium, steel and enamel can be worked on easily.  The tool keeps its shape and is easy to clean with common equipment like an ultrasound bath, benzine, or with cleaning rubber/ paste.  The six shapes are half-round, crossing (oval), barrette special, triangular, pillar, and round.  Made in Switzerland by Vallorbe.