ALTSTONE RIN #1000 & #5000 set [English ver.] Includes English manual RIN – High Density. Precise Edge. Compact Form. Hard & Dense Ceramic Whetstone Set for Medium & Finishing (#1000 / #5000) with Nagura ALTSTONE RIN whetstone set includes a #1000 medium grit and a #5000 finishing stone. These Japanese-made ceramic sharpening stones offer professional-level sharpening at home with Splash & Go convenience. [Features] High Grinding Power: WA abrasives deliver consistent sharpening performance with dense ceramic construction. Versatile Application: Effective for both stainless and high-hardness steel kitchen knives. Non-Slip Mat Included: Ensures safe and stable sharpening without a whetstone stand. Thorough Inspection: Each item is quality-checked by both manufacturer and seller before shipping. [Specifications] RIN is ALTSTONE's Hard/Dense type whetstone. ✅RIN1000 – Medium Sharpening Stone Grit: #1000 (Medium) Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8") Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") Weight: 430g (Main) / 70g (Nagura) Type: Splash & Go (No soaking required) ✅RIN5000 – Finishing Sharpening Stone Grit: #5000 (Finishing) Stone Size: 180 × 60 × 20 mm (7.1" × 2.4" × 0.8"), Compact size ideal for home use. Nagura: 60 × 25 × 20 mm (2.4" × 1.1" × 0.8") Weight: 520g (Main) / 70g (Nagura) Type: Splash & Go (No soaking required) Planned by ALTWAYS.LLC and proudly manufactured in Japan. ALTSTONE: Precision-engineered in Japan In Japan, sharpening blades has never been just the work of professionals. For many years, people have used whetstones at home to keep their kitchen knives sharp—it’s a tradition deeply rooted in daily life. This culture has shaped the evolution of Japanese sharpening stones themselves. Brands like Shapton, King, Naniwa, and Suehiro have each developed their own technologies and philosophies, refining bonding methods, abrasive design, and sharpening feel. Japan has developed a particularly rich and refined sharpening culture. Few other countries offer such a wide variety of products tailored to different blade types, with such careful attention to sharpening feel and finish. In terms of materials, structure, and craftsmanship, Japanese sharpening stones continue to set a high standard globally. ALTSTONE offers products that reflect the refinement and subtlety of Japan’s sharpening culture. For example, our RIN series is engineered for durability and performance, featuring a hard and densely compacted structure that resists wear and maintains flatness over time. RIN achieves a high-level balance of hardness and cutting power through optimized bonding techniques and surface treatment, making it well-suited for tasks that demand precision and clean finishing. Sharpening may not be flashy. But there’s something quietly special about the meal you prepare with a freshly sharpened blade. We hope that an ALTSTONE whetstone can be part of that small but meaningful change in your everyday cooking. How to Sharpen a Knife with ALTSTONE ▶ Watch our sharpening tutorial on YouTube: https://www.youtube.com/watch?v=v7rpC0RKRgI&t=12s

ALTSTONE RIN #1000 #5000 #10000 set [English ver.] Includes English manual 　 　Note: This set does not include a nagura stone. No Soaking Needed – High-Density Ceramic Whetstone "RIN" Always ready to use. Thanks to its non-absorbent nature, "RIN" allows you to start sharpening immediately—no soaking, no waiting. 【Set Includes】 - Whetstone - Nagura stone - Compact anti-slip mat 【Firm Type】 A hard-type stone that delivers reliable sharpening. Balanced for both hardness and cutting performance. 【Made in Japan】 Japanese-made ceramic whetstone. We work with domestic factories to manage everything from planning to delivery, ensuring top quality at a reasonable price. 【#1000 Grit – Your Go-To for Everyday Sharpening】 This is the essential grit for general sharpening. A slightly dulled kitchen knife can be revived easily with #1000. In fact, many home cooks find #1000 sufficient as a finishing stone. If you're buying your first whetstone, #1000 is the ideal choice. 【#5000 Grit – A Step Up for Sharper Edges】 Ideal for those who seek even greater sharpness. #5000 provides a refined finish that enhances cutting performance beyond basic sharpening. 【#10000 Grit – Ultra-Fine Finish for Precision Edges】 Designed for ultimate edge refinement. #10000 is perfect for achieving an exceptionally smooth, razor-sharp blade for delicate tasks. 【High Abrasive Power】 Packed with high-density WA (white aluminum oxide) abrasives, it offers excellent metal removal. Even beginners can clearly feel the knife getting sharper as metal is shaved away. 【Compatible Steels】 Suitable for common household stainless steel knives and even high-hardness carbon steel (hagane) blades. Note: Not compatible with non-metal blades such as ceramic or special materials like titanium. 【Anti-Slip Mat Included】 Comes with a compact anti-slip mat so you can sharpen safely even on stainless kitchen countertops. The mat’s rubber material was carefully selected from dozens of options for maximum grip. Ideal for users without a dedicated whetstone base. 【Thorough Quality Control】 All stones undergo double inspection—first by the manufacturer, then by us—to ensure only flawless products are shipped. 【Specifications】 Grit:  #1000, #5000, #10000 Size:  180 × 60 × 20 mm (7.1 × 2.4 × 0.8 inches) Weight:  Main Stone: 520 g (18.3 oz)  Nagura: 70 g (2.5 oz) Water Absorption: None – use it dry without soaking. 【Shipping】 - Free shipping within Japan. Shipping method will be determined based on inventory and whether items are bundled. - Shipping outside Japan varies by region. Please add the item to your cart and check the shipping details at checkout. Make your everyday cooking more enjoyable. A sharper knife transforms the way you cook. If this product interests you, click "Add to Cart" and get started today.

ALTSTONE “RIN” #1000 Non-Soaking Whetstone – Pro Series No soaking required – just splash and sharpen. “RIN” is a dense ceramic whetstone designed for speed, precision, and consistency. Set Includes: Main Whetstone (#1000) Nagura Stone (#1000) Anti-slip Rubber Mat Key Features: [Hard-Type Stone] Despite its hardness, “RIN” offers excellent blade contact without slipping. A perfect balance of hardness and grindability, suited for serious users. [Made in Japan] Crafted in Japan with strict quality control. The most-used #1000 medium grit comes paired with a nagura stone for surface conditioning. From planning to shipping, all stages are managed in Japan to ensure both quality and value. [#1000 Grit – The Essential Grit] This is the standard grit for routine maintenance. It easily restores slightly dulled knives, and for most home cooking, #1000 grit is all you need. Ideal for beginners purchasing their first whetstone. [High Abrasive Power] Infused with a high concentration of white aluminum oxide (WA), this stone offers powerful sharpening. Even first-timers can instantly feel the steel being ground away. [Compatible Steels] Sharpen stainless kitchen knives, high-hardness carbon steel knives, and more. Note: Not suitable for non-metal blades (e.g. ceramic), titanium, or other exotic alloys. [Anti-Slip Mat Included] Includes a kitchen-grade rubber mat that prevents slipping even on stainless surfaces. Carefully selected from dozens of materials to ensure strong grip. You can start sharpening immediately—no base required. [Double Inspected] Every stone is thoroughly checked both by the manufacturer and by us before shipping to ensure flawless quality. [Specifications:] - Main Stone Grit: #1000 - Nagura Grit: #1000 - Main Size: 180 × 60 × 20 mm - Nagura Size: 28 × 60 × 20 mm - Weight: Main: 520g / Nagura: 70g - Water Absorption: None (Non-soaking. Use instantly with a splash of water)