Main Design Keyword of F3 systems is ‘Soft & Confidence’ and by using smooth line, it gives Ergonomic Grip and each function of the products provide innovative efficiency in mobility and usability. The Cap vertically moving on the Corn Cutter protects users and it opens for replacement of the blade. The Steel Callous Remover can be opened with one hand for easy and clean removal of Callous. By using wide surface of the Ceramic file overall Callous on the foot can be removed and use inside Sapphire File to remove in details.