Naniwa Carbide Teppei Tonkachi Stone Hammer / Masonry Hammer — 20mm Double Carbide Tips, Oak Handle, Total Length 350mm

OVERVIEW & PRODUCT DESCRIPTION
Achieve precise natural stone shaping, Teppei-ishi (slate/flagstone) trimming, and professional masonry detailing with exceptional durability using the Naniwa Carbide Teppei Tonkachi Stone Hammer (Model #550).

Manufactured by Naniwa—renowned for superior carbide tooling and professional stone-working equipment—this specialized Teppei Tonkachi features high-grade tungsten carbide tips expertly brazed onto both the blade face (20mm width) and the square face (10x20mm dimensions). Mounted on a sturdy, shock-absorbing Japanese oak wood handle (樫柄 - 350mm total length, 90mm head length, 250g head weight), it delivers balanced control and powerful impact transmission for intricate stone dressing and surface flattening.

Whether used for professional landscaping, Japanese garden construction (Nihon Teien), architectural stone masonry, or flagstone splitting, this authentic Japanese tool delivers uncompromising performance.

KEY FEATURES & SPECIFICATIONS
- Double-Sided Tungsten Carbide Tips (両超硬付): Features high-grade tungsten carbide cutting faces on both the blade side (20mm width) and the square side (10x20mm dimensions) to maximize wear resistance and tool longevity against hard stone.
- Ergonomic Japanese Oak Wood Handle (樫柄付き): Fitted with a durable, resilient natural oak handle, providing excellent shock absorption and a secure grip during repetitive striking.
- Balanced 250g Head & 350mm Reach: Engineered with an overall length of 350mm, a head length of 90mm, and a precise 250g weight (全長350ｍｍ・頭90ｍｍ・重量250ｇ) to ensure nimble handling, reduced fatigue, and pinpoint strike accuracy.
- Professional Stonemasonry Utility: Ideal for shaping Teppei-ishi flagstones, natural stone dressing, surface flattening, masonry joints, and traditional Japanese garden stone construction.
- Handcrafted in Japan: Built with uncompromising Japanese quality standards.

- Specifications:
  - Brand: Naniwa / Naniwa Carbide (ナニワ合金 / ナニワ超硬合金)
  - Model: #550 (鉄平トンカチ 20ｍｍ 両超硬付 樫柄付き)
  - Total Length: 350mm (全長 350ｍｍ)
  - Head Length: 90mm (頭長 90ｍｍ)
  - Blade Face Width: 20mm (刃幅 20mm)
  - Square Face Dimensions: 10 x 20mm (角 10mm×20mm)
  - Head Weight: 250g (重量 250ｇ)
  - Handle Material: Japanese Oak Wood (樫柄)
  - Edge Type: Double-sided carbide-tipped masonry hammer (両超硬付 鉄平トンカチ)
  - Origin: Made in Japan

IMPORTANT USAGE & CARE GUIDE FOR CARBIDE TOOLS
- Full-Surface Strike Alignment: Always ensure the entire striking surface (blade face or square face) makes flat contact with the stone. Striking at an angle (hitting on points or corners only) will cause the delicate carbide tips to chip.
- Break-In Period: Exercise extreme caution when using a brand-new tool. Gradually break in the sharp edges by slowly rounding them off and allowing the tool to adapt to your workflow during initial use.
- Delicate Nature of Carbide: Carbide products are extremely hard yet brittle and sensitive to impact shock. Please handle with care.
- Note on Chipping: Due to the nature of carbide tools, improper striking angles may cause minor chipping along the edges or corners. This is a normal characteristic of high-hardness striking tools and is not considered a product defect. Chipped edges can easily be repaired and re-sharpened using a diamond grinding stone.
- Storage: Wipe away dust, moisture, and debris immediately after use. Store in a dry location.