Multi-Stage Premium Knife Sharpener Whenever Master Grade team see there is another way to sharpen the knife, they just do it. Master Grade Multi-Stage Premium sharpener is designed with professional capabilities in mind, very easy to use. It is premium model for home use. Master Grade is always quality, performance and value.Master Grade has exclusive patented angle guides which are able to sharpen knife blade thinness up to 1/4" width and 1/8" high for a re-profile knife blade. No other brands of knife sharpener can function this way because other machines only sharpen blades up to 1/16" high. Master Grade''s unique angle guides prevent this problem.This piece will sharpen your knife sharp, so you don''t have to throw away your dull knivesRe-profile blade to restores bevel/extends cutlery life up to 10 timesAngle guides maintain 15 degree blade edgeNot for serrated, single edge and negative curve knivesPremium Soft stone technology minimizes burrVery easy to use and save moneyPremium Industrial grade motor and bearingDesigned and Built by a Master in the Sharpening IndustryUL, CE and GS certifiedCompact size L X W X H: 9.0" x 3.0" x 3.7"Made in Taiwan