[Kondo] Carbide-Tipped Koyasuke Pitching Tool with Wooden Handle Carbide Tip:10x40mm (0.39x1.57") [KMF010103]

Masterfully forged by [Kondo], this heavy-duty Carbide-Tipped Koyasuke (Japanese Pitching Tool) is engineered for the most aggressive rock-facing and heavy bulk material removal. Equipped with the thickest 10x40mm tungsten carbide block in the series, it generates devastating splitting force driven by the powerful centrifugal leverage of its wooden handle. It is the ultimate heavy-weight asset for snapping off massive stubborn corners from hard walling stones in Dry Stone Walling (DSW), modifying huge structural boulders in Japanese Gardens, and executing powerful rock-facing in architectural masonry.

Utilizing a traditional wooden handle that naturally dampens harsh, high-frequency impact vibrations, the Koyasuke completely prevents hand numbness during extended field shifts. The ultra-thick tungsten carbide block is fused to the forged steel head via precision brass brazing, combining intense cutting-edge hardness with superior structural shock mitigation. ⚠️ WARNING: To safeguard the thick brass layer and prevent the carbide from chipping under heavy hammer blows, proper pitching technique is mandatory. The tool must be struck squarely; never apply lateral prying or twisting leverage against the stone while striking. Additionally, always lift the blade slightly away from the stone face between consecutive strikes to relieve cumulative stress on the brazed joint.

Since there are much sizes, when necessary, please ask. Our stock is from 5mm*28mm (0.2inch * 1.1inch) to 12mm*50mm (0.47inch * 1.97inch).

The main use
Various processing stone of stonemasons, sculptors, and gardeners (the angle of a stone and roughly be broken linearly).
For Art (Sculpture), Architecture, Landscape design, Garden, Repair the ruins ,etc.

It will be necessity about five business day to send.

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

This Koyasuke (10mm*40mm bits) is made in Japan. It is product of Kondo stonemason's tools factory in Okazaki City, Aichi Pref known as a town of the stonemasons. 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 Koyasuke (10mm*40mm bits) [KONDO]

* Please level an edge and do not strike it.
* The degree to strike can be mastered by experience. Please start with striking more lightly at first.
* Although based also on usage, SETTO suitable for this size is a 1.1 kg.
* When experience is shallow, please use SETTO lighter than this. Carbide may be damaged.
* It is at the shipment time and is taking out the edge. It is desirable to build the angle which ground by the GC100H-whetstone and was suitable for work.