[Kondo] 8buYA Traditional Japanese Stone Dividing Wedge Chip (Single Piece) [KMF130201]

The [Kondo] 8buYA is a traditional, single-piece Japanese stone dividing wedge chip forged from high-grade tool steel, engineered to cleave rocks along a precise predetermined line. Unlike round-hole expansion systems, this is a solid, one-piece wedge designed to be driven directly into shallow slots pre-cut with a diamond blade or tapped into expanding structural cracks. By lining up two or more of these 8buYA chips in a row and striking them progressively with a Setto hammer, immense downward and lateral cleavage pressure is applied, resulting in a beautiful, organic natural split face. This traditional flat-wedge method leaves behind the historic rectangular indentation marks known as "Ya-ana" (wedge holes)—the exact same masonry signatures visible on the grand stone walls of ancient Japanese castles, shrines, and Buddhist temples. It remains an indispensable tool for contemporary Niwashi (Japanese gardeners) and Dry Stone Wallers (DSW) seeking authentic historic texturing. ⚠️ WARNING: Always wear impact-resistant safety goggles and heavy leather gloves when driving steel wedges, as metal spalling and sharp stone flying fragments pose severe physical danger. Ensure the striking hammer hits the wedge head perfectly square to prevent dangerous deflections.

The main use
Dividing Stone
For Art (Sculpture), Architecture, Landscape design, Gardening, Repair the ruins ,etc.

It will be necessity about 7 business day to send.

About a maker, Kondo Masonry tools factory (AICHI pref)

It is product of Kondo stonemason's tools factory in Okazaki City, Aichi Pref known as a town of the stonemasons. Although carbide products is famous now, masonry tool manufacture of the steel which it has continued building from generation to generation is also an expert.
Yoji Kondo is the boss and the second of Kondo stonemason's tools factory, and he is an expert that has been worked for 50 years. He is known to Japanese craftsmen handling stones as one of stonemason's tools makers of carbide who are few in Japan now. His technique of brass brazing is highly valued because it is rare technique not only in the world but also in Japan.

The notes on use about 8buYA [KONDO]

* This is not carbide products but a product of steel. A tip is round to the degree of every use. Please purchase steel products after an understanding.