Sharpening Stones

The Naniwa Professional 400 Grit Ceramic Stone is the coarsest stone in the Professional series. This stone is designed to cut very quickly and to remove a lot of steel. Although ceramic stones are by nature less aggressive than traditional or oil stones this stone does move a sustantial amount of steel. We recommend this stone for re-profiling, reshaping and thinning blades, removing chips, repairing tips and other heavy work that requires quick cutting. The 400 grit can also be used as an initial stone for confident sharpeners who want to speed up their work, but we don't recommend using this as your go-to primary stone. This will leave a fairly rough edge that needs to be followed by a smoother stone. We'd recommend moving from this stone to a 1000 grit before you finish on a high-grit polishing stone.  Learn More

Restore Your Edge with the Pure Power of Natural Novaculite When your professional blades lose their bite, synthetic stones often wear down as fast as the steel they are meant to sharpen. The RH Preyda 400 Grit Arkansas Stone is different. Sourced from the Ouachita Mountains, this stone is composed of natural Novaculite—a microcrystalline quartz renowned for its unique combination of extreme hardness and aggressive abrasiveness. This isn't just a whetstone; it is a precision instrument designed for those who demand a consistent, professional-grade edge. The Natural Advantage Unlike mass-produced synthetic stones that 'dish' and become concave with heavy use, the natural density of RH Preyda’s Novaculite ensures a flatter sharpening surface for a significantly longer lifespan. The 400-grit surface is the 'workhorse' of any sharpening kit, specifically engineered to reset the bevel and remove nicks from neglected or heavily used blades. By utilizing a water-based system, this stone provides a cleaner sharpening experience without the mess of traditional honing oils. Professional Stability & Scope At 8" x 3" x 1", this bench stone offers a massive surface area capable of handling everything from delicate paring knives to heavy-duty 10-inch chef’s knives and butcher's scimitars. To ensure safety and precision, each stone includes a custom-fitted silicone non-slip base that anchors the stone to your workstation, allowing you to focus entirely on maintaining your sharpening angle. Whether you are a professional chef or a dedicated home cook, this American-made stone represents the gold standard in edge maintenance. Learn More