Special File For Soft Nails For soft, thin nails 1STK Color: Size: Art. No. Description Use this high-quality special file with flexible plastic core and very fine graining to shorten thin and soft nails. For especially gentle filing. It prevents the nails from breaking during the filing process. Detailed information of the ingredients can be found here: ARTDECO makeup and ARTDECO care Application File nails into shape from the corners to the centre in one direction.