The sapphire nail file from the Twinox�Instruments series is made of corrosion-proof stainless steel. It is made of a hardened sheet steel incorporating grinding grains. The matt satin finished of the Zwilling�sapphire nail file stands out from the crowd. Its hygienic surface can be wonderfully cleaned. Show off your perfectly manicured nails at all times with a regular professional manicure with this hard-wearing file.