Chalk line with hand crank, 3.5:1 gear ratio for fast rewinding, and fast unwinding without turning the crank. Chalk view window in high-impact ABS plastic housing lets you see exactly how much chalk you have left. Slide-in compartment for quick filling, steel crank and hook fold into the case. Chalk not provided. 135 x 75 x 50 mm, String length 30 m.