Chef’sChoice 4643 ProntoPro Review - Chef's Resource

The Chef’s Choice 4643 AngleSelect professional manual sharpener is ideal for both 15- and 20-degree class knives. Using 100 percent diamonds, the hardest natural substance on earth, our patented abrasives sharpen edges faster and easier. Designed to work with straight edge and serrated knives. - Chef's Choice by EdgeCraft

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