Shapton GlassStone 4000 Grit Ceramic Whetstone – 3 Micron Type WA
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Eligible US purchases include 180-day returns and a free prepaid return label.
Free US shipping over $99. Orders are normally fulfilled within 2 business days; UPS Ground transit is typically 1–5 business days. Custom work may add 1–2 business days.
Every order is fully insured. If a package is lost or damaged, contact us and we will handle the claim.
Shapton GlassStone 4000 Grit Ceramic Whetstone – 3 Micron Type WA
The Shapton GlassStone 4000 is a fine finishing waterstone for smoothing the scratch pattern after medium-grit sharpening and creating a controlled, polished kitchen edge. Its 3-micron-class Type WA layer cuts cleanly without requiring a soak.
This is the full-size Shapton GlassStone GS/HR model—not GlassStone Seven, RockStar, or the HC formulation. Type WA identifies Shapton’s white-alumina abrasive. A 5 mm sharpening layer is permanently laminated to 5 mm tempered glass for a precise, stable working surface.
Why choose the 4000 grit
- Finishes edges after 1000- to 2000-grit sharpening
- Refines burrs and medium-stone scratch patterns
- Creates a smooth edge that remains practical for kitchen work
Specifications
- Brand: Shapton
- Series: GlassStone / GS Series HR
- Manufacturer SKU: 50103
- Barcode: 4944509501032 (GTIN-13 / JAN)
- Grit: 4000
- Particle class: 3 micron class
- Abrasive type: Type WA (white alumina)
- Construction: 5 mm abrasive layer laminated to a 5 mm tempered-glass base
- Dimensions: 210 × 70 × 10 mm (8.27 × 2.76 × 0.39 in.)
- Product weight: Approximately 360 g (12.7 oz.)
- Water preparation: Splash-and-go; no soak required
- Included: One GlassStone; holder sold separately
- Country of origin: Japan
How to use
- Secure the stone on a non-slip stone holder with the abrasive face up.
- Add clean water and begin sharpening. An optional 5–6 minute wetting can improve feel, but long soaking is unnecessary.
- Maintain a consistent angle and use controlled pressure, adding water as needed.
- Flatten periodically with a compatible lapping plate to preserve accuracy.
Care
Rinse after use and let the stone dry completely at room temperature before storage. Do not use detergent, hot water, direct sun, forced heat, or long-term soaking. Keep the sharpening face flat and free of embedded coarse grit.
Build a Shapton progression
Use after the GlassStone 2000. Finish here for a polished working edge, or continue to the GlassStone 8000 for a more highly polished finish. Browse the full Shapton whetstone collection.
Common questions
Does a GlassStone need soaking?
No. It is designed for splash-and-go use. A brief optional wetting can improve feel; avoid long soaking.
What does Type WA mean?
WA is Shapton’s designation for white alumina, the abrasive used in this model.
Is this a RockStar or GlassStone Seven?
No. This is the full-size, 210 × 70 mm GlassStone with a 5 mm abrasive layer on a 5 mm tempered-glass base.
Shipping, returns and order protection
US shipping: Free on orders over $99. Orders are normally fulfilled within 2 business days, and UPS Ground transit is typically 1–5 business days after fulfillment. Custom handle installation or sharpening may add 1–2 business days.
Returns: Eligible purchases may be returned within 180 days with a free prepaid return label. Knives sharpened by Tokushu Knife or fitted with a custom handle remain eligible if they are otherwise new, unused, undamaged, and returned in their original packaging with all included components. The same refund terms apply.
Order protection: Every order is insured. If a package is lost or damaged, contact us at Tony@TokushuKnife.com and we will handle the claim.
Outside the US: Supported international orders from TokushuKnife.com typically ship via FedEx Delivered Duty Paid (DDP). Tokushu Knife pays all applicable import duties and taxes on the customer's behalf. Customers are not responsible for paying duties or taxes. Available destinations, shipping charges and delivery estimates are shown at checkout. Customers may also shop at TokushuKnife.eu for regional inventory and options.
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Steel, Construction and Care
Our catalog includes stainless, semi-stainless and carbon steels selected for edge performance and durability. Carbon steels may develop a patina, while stainless steels are designed to resist discoloration. Follow the care guidance on each product page, hand wash only and dry the knife promptly after use.
