RIN – High Density. Precise Edge. Compact Form.

ALTSTONE RIN Ceramic Whetstone Set – Fine #5000 & Super Fine #10000 with Nagura | Made in Japan

ALTSTONE RIN whetstone set includes a #5000 fine and #10000 super fine ceramic sharpening stone. Crafted in Japan for professional-grade results, both stones are Splash & Go type – no soaking required.

[Features]

• High Grinding Power: WA abrasives with dense ceramic structure ensure effective sharpening.
• Ideal for Kitchen Knives: Works with stainless and high-carbon steel blades.
• Stable Use: Includes a non-slip mat for safe sharpening on any surface.
• Quality Control: Double-checked in Japan and again before shipment.

[Specifications]

RIN #5000 – Fine Finishing Stone

• Grit: #5000
• Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8")
• Nagura: 60 × 25 × 20 mm
• Weight: 430g (stone), 70g (nagura)
• Type: Splash & Go

RIN #10000 – Super Fine Finishing Stone

• Grit: #10000
• Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8")
• Nagura: 60 × 25 × 20 mm
• Weight: 430g (stone), 70g (nagura)
• Type: Splash & Go

Designed by ALTWAYS.LLC. Proudly made in Japan.

About Japanese Whetstone Craftsmanship

In Japan, sharpening blades is part of daily life. Over the decades, this tradition has led to the evolution of highly refined Japanese whetstones, shaped by top brands like Shapton, King, Naniwa, and Suehiro.

ALTSTONE's RIN series is crafted with that same philosophy – combining dense composition and hard bonding to deliver smooth feedback, long-lasting flatness, and razor-sharp results in a compact form.

Perfect for chefs, woodworkers, and hobbyists seeking ultra-fine sharpening without soaking hassle.

How to Use

▶ Watch the tutorial on YouTube:
https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

Transaction Details

Shipping

Ships from Japan with tracking and insurance.

Customs & VAT

Buyer is responsible for any import duties or VAT. Total cost may exceed the purchase price depending on your country.

Return Policy

Returns accepted within 30 days. Items must be unused and in original condition. Buyer pays return shipping. Refund issued after inspection.