Snap and rewind with ease! The Keson GB1 is a great chalk line reel house: Clutch line release and high-speed rewind; bold, consistent lines; sturdy reliable box. The poly-cotton cords is stronger than most and leaves a crisp line on almost any surface. A clutch rewind enables the string to be pulled without the handle spinning. The No-Spill Grommit keeps refills clean and easy: Poke the chalk bottle top through the grommit and squeeze.