Zwilling Twin Diamond Steel Sharpeners & Steels ricer and strainer have flat bases for ricer and strainer Easily create dozens of French fries or julienned vegetables with a single push of the lever Simply place small or half potatoes into chute and squeeze through for thick or thin fries Interchangeable stainless steel blades with 25 holes for large and 49 holes for small fries Easy to operate lever action Hand wash only The flat surface provides more contact with edge to achieve the same results as a traditional rod shape but with fewer strokes A diamond coated steel will work quickly to produce a very sharp edge