OXO Good Grips Adjustable Handheld Mandoline Slicer for Vegetables

Whether you're making cucumber salad, an apple tart or a potato gratin, a dull or unstable veggie cutter just won't do the job. Select the perfect slice size - 1 mm, 2.5 mm or 4 mm - and use the large non-slip handle to slide food over the stainless steel blade for perfect, even slices.

eBay