Making a cucumber salad, apple tart or potato gratin? The Hand-Held Mandoline Slicer can help. Slide the thickness adjuster to select slice thickness; choose from 1mm, 2.5mm and 4mm. Then secure food to holder and slide over the stainless steel blade for perfect, even slices. The clear surface shows slices accumulating below. Stainless Steel blade. Dishwasher Safe.