The Tajima Sumitsubo V8 Tsurukubi is a compact Japanese chalk line specifically designed for hard-to-reach areas, corners, and tight spaces. Its curved "Tsurukubi" (crane neck) tip improves string control and makes marking easier in corners where classic models become less practical.

The Full Open system allows the body to be fully opened without tools, simplifying cleaning and string replacement. The V8 model also incorporates leak-proof seals to limit ink drying and a secure retractable tip for greater comfort and safety during use.