A mandoline is a kitchen tool used for slicing and cutting fruits and vegetables with precision. It features a flat surface with a sharp blade that can be adjusted to create various thicknesses. This tool allows cooks to achieve uniform slices, which can enhance the presentation and cooking of dishes. Mandolines come in different designs, including handheld versions and larger, more stable models. They are often made of stainless steel or plastic and may include safety features like hand guards to protect fingers while slicing. Popular uses include preparing salads, gratins, and garnishes.