OXO Good Grips Hand-Held Mandoline Slicer. Slices cleanly, quickly and safely on a plate or over a bowl. 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.