The Tajima Perfect Sumitsubo is a professional Japanese chalk line designed to offer precision, reliability, and simplified maintenance on site. Its Full Open system allows the body to be fully opened without tools for easy interior cleaning and quick string replacement.

This model incorporates several improvements designed for intensive use: leak-proof seals limiting ink drying, a quick-load lever usable with a single button, a reinforced curved spout facilitating string retention, and high-absorption cellulose cotton ensuring uniform ink distribution. Thanks to its automatic "Point Karuko" system, the needle retracts automatically when rewinding for greater safety and comfort.