Precision sharpening for European-style Wüsthof knives hones both fine angled and serrated blades. The easy-to-operate has four distinct stages to hone and sharpen both Standard and Asian blades. The course stage quickly sharpens and sets the angle, while the fine stage works to finish and polish the edge. Use the Standard side to sharpen blades at a 14- degree angle and the Asian side to sharpen at a 10-degree angle.