Rough knife with V-sharpened chisel function. The edge is ground with a double edge angle and a final browning on a leather disc. Blades of 3 mm carbon steel hardened to 58-60 HRC. The shaft and sheath are made of extra impact-resistant PP plastic. Unique function for attaching the sheath around the button on the work clothes means that it does not come loose, at the same time as it is easy to remove. Tuning knife ST fits in the same sheath as coarse knife GK.