Assembled in USA, the Chef'sChoice electric sharpener maintains sharp edges on knives for efficient chopping and dicing. Just pass the knife a few times through each slot: the first for sharpening, the second for stropping/polishing. Two-stage process sharpens and strops straight-edge and serrated blades. First stage sharpens blade using a 100% diamond-coated abrasive disk. Second stage uses stropping disks for a finished polish. Durable brushed-stainless-steel housing.