3-stage sharpening system Blunt kitchen knives? Dull cutting tools? Dont waste time with the whetstone kit! Just 3 swipes with knife sharpener make old knives cut like brand new! The 1st diamond sharpening rod repairs and straightens damaged blades before the 2nd slot sharpens to restore its V-shape. Finally, the 3rd slot for a clean polish. Pls note: Not suitable for ceramic knives, serrated knives, scissors Golden sharpening angle We've went through the experiment many times and found out the 36 degree is the Golden Angle for sharpening, which can keep the best balance between sharpness and sharpness retention ability Safe & effortless use Powerful suction base provide superior stability and sharpening power, without risk of slipping, sliding or jabbing. Never worry about cutting hand while holding the sharpener