CHEF'SChoice Diamond UltraHone Sharpener Model 312 This compact professional electric 2-Stage knife sharpener sharpens both straight edge and serrated 20 degree class knives to better than factory edges, in just minutes: 2-Stage sharpener with precision angle control 100% diamond abrasives in Stage 1 and 2 Advanced micron size, 100% diamonds in Stage 2 Fast, reliable results Origin: Made in the USA Warranty: In Australia by Fahoo