Okatsune Curved Sharpening Stone No.412 for Pruning Shears Authentic Japanese Pocket Stone — Specially Curved-Edge Whetstone for Secateurs & Pruning Shears

OVERVIEW & PRODUCT DESCRIPTION
The official Okatsune curved sharpening stone designed specifically for maintaining secateurs and pruning shears.

Manufactured in Japan by Okatsune—one of the most trusted names in Japanese bonsai and landscaping tools—the No.412 Sharpening Stone is an essential field accessory engineered for maintaining curved blades. 

Featuring a unique dual-surface design, one side is completely flat while the opposite side is specially contoured with a subtle curve (R-shape). This curved profile matches the inner radius of pruning shears, secateurs, and bypass blades perfectly, allowing you to hone and remove burrs along the entire length of curved edges without damaging the blade geometry. Compact and lightweight (60g), it fits effortlessly into any field tool belt.

KEY FEATURES & SPECIFICATIONS
- Specially Contoured R-Shape (Curved Side): Smoothly glides along the inner curved bevel of bypass pruning shears and secateurs for precise, full-contact edge touch-ups.
- Dual-Surface Versatility: Features one flat face for standard flat honing/deburring and one curved face for contoured blades.
- Slim & Lightweight Field Profile (60g): Compact dimensions (150mm × 25mm × 9mm) make it easy to hold safely in hand and carry on-site in your tool pouch.
- Authentic Okatsune Quality: Designed and produced in Japan to complement Okatsune’s legendary red-and-white handled shears and high-carbon steel blades.

- Specifications:
  - Brand: Okatsune (岡恒)
  - Model: No.412 (#861 / 剪定鋏用砥石 片面アール付)
  - Profile: One Flat Side / One Curved (R-Shape) Side
  - Dimensions: 150mm × 25mm × 9mm
  - Weight: 60g
  - Origin: Made in Japan

HOW TO USE
Splash the stone with water before use. Hold the stone firmly and stroke the curved side gently along the inner curve of your secateurs or pruning shears at a low, consistent angle to clean the edge and clear burrs. Use the flat side for straight blade touch-ups.