The Duo Feet is an instrument available only from Yumi Feet. An essential tool to the De Si Jolis Pieds skincare, it has two functions thanks to its two sides. A scraper side (form of a squeegee without a non-cutting instrument blade) used to gently remove softened calluses by applying the patch. A smoothing side, with an adaptable and disposable smoothing adhesive, completes the work of the scraper by erasing the rest of the callus.