The Dual Action Callus File with diamond particles has been developed using Scholl's proven grinding technology. It gently removes even the toughest calluses, leaving your feet silky soft from the very first use. The file offers the following advantages: no blades, no cuts – it removes calluses without damaging the normal, healthy skin; ergonomically shaped, non-slip handle; specially designed to reach hard-to-access, curved areas of the foot.