Smith’s 4-Inch Diamond Sharpening Stone (part no. 50363) is built with a fine grit for refining and polishing an edge rather than reshaping a badly damaged one. The cutting surface is made of multiple layers of micron-sized monocrystalline diamonds bonded in nickel to a flat metal base, giving it a durable, consistently flat sharpening surface that resists the wear and dishing common to traditional stones over time. That flatness matters for getting a truly even edge, since a worn or uneven stone surface can actually make sharpening less effective the longer it’s used. The stone ships with a protective cover, keeping the diamond surface clean and protected when it’s not in use. At 4 inches, it’s a compact, travel-friendly option for touch-up sharpening wherever it’s needed.

Key Specifications

• Uses a fine grit diamond surface for refining and polishing an edge.
• Diamonds are bonded in nickel to a flat metal base for long-term flatness.
• Ships with a protective cover to keep the surface clean between uses.

Frequently Asked Questions

What grit is this stone? It’s a fine grit, built for refining and polishing rather than heavy reshaping.

Does it come with any protective packaging? Yes, it ships with a cover to protect the diamond surface between uses.

Buy the Smith’s 4-Inch Diamond Sharpening Stone with Cover

Keep a compact, travel-ready diamond stone on hand for a fine, consistently flat touch-up edge anywhere. Order from Smiths Products‘s knife accessories lineup and our Lubbock, Texas team will get it on its way to you.