Waring  (WKS800) Commercial Three-Station Knife Sharpener Commercial three-station knife sharpener with two grinding wheels and one stropping wheel that provides maximum sharpness and polish Stropping wheel operates in reverse direction for more efficient removal of burrs and polishing of the blade Featured with magnetized drawer under grinding wheel which captures metal shavings and makes cleanup easier than ever Includes compact footprint that makes it easy to use and store Grinds at 18 degree to 22 degree angles which are optimum angles