Title: Very effective on most (not all) knives. An incredible value and easy to use.
Product review: I have quite a collection of kitchen knives, and several sharpening devices. This one works better than any of them, including the $100 motorized three-stage sharpening machine.It does not work well on one very thin knife that requires a special grinding angle. It works well on all ordinary straight-bladed knives, and pretty well on many serrated blades.Extremely easy and fast to use with no training.
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