Combined Electric and Manual SharpeningRazor sharp edges with advanced 3 stage hybrid technology, combining electric and manual sharpening For sharpening straight and serrated knives; kitchen and household knives, sporting knives and pocket knives Stage 1 and 2 electric sharpening and manual honing in stage 3, for a razor sharp, arched shaped edge that is stronger and more durable Ultra thin diamond abrasives in stage 3 ensure a super sharp polished edge 3 stage sharpening and our advanced