A drum flaker and knife therefor. A drum flaker comprises a drum for turning about an axis of revolution, a plurality of knife assemblies mounted to the drum, and a plurality of knives for mounting in the knife assemblies. The knives each have an elongate axis and comprise, on a first cutting side of the knife, at least two sets of cutting edges. The cutting edges of one of the sets alternate with and are radially offset from corresponding and respective cutting edges of the other of the sets.
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