Chalk-Rite® II Ultra-Thin. 0.5 mm chalk snap-line,

Tajima, the name in contractor quality chalk boxes. 100′ of Premium grade .5mm braided nylon/polyester line. Five gear drive system for smooth rewinds. Crank folds away when not in use. Die Cast aluminum box. End hook stay to keep end hook from catching on objects when pulled from pouch or tool box. Positive seal gasket.