The Tajima SeF Perfect Sumitsubo is a Japanese chalk line designed to improve speed and mobility on construction sites. Thanks to its SeF Hook system, it can be attached directly to a belt without the need for a tool pouch, allowing for quick access and greater efficiency during work.

Equipped with a 20-meter line with a 10-meter auto-rewind, this sumitsubo is ideal for precise marking on wood, panels, and construction materials. Its curved nozzle facilitates work in corners and tight spaces, while its 20 ml ink reservoir and anti-leak system ensure clean and reliable use. The body fully opens without tools to simplify maintenance and line replacement.