The Chef's Choice 1520 knife sharpener was engineered for astonishing sharp edges on all your European, American, and Asian knives (15 & 20 degree class). The 3-stage angle-select system is for optimum versatility in providing the perfect edge for all of your kitchen, sports, pocket, and even serrated knives. The electric knife sharpener has 100% diamond abrasives for sharpening and honing. The white, diamond hone sharpener features patented flexible stropping / polishing disks for a super sharp, microscopically flawless polished edge.