Quickly mark clear and visible straight lines on your surfaces with this Milwaukee chalk reel. The 2mm thick, extra bold lines are easy to see, and the planetary gear system with 4/1 gear ratio ensures long-lasting performance and fast line retraction. With 30m of line and a large chalk capacity to help you work for longer between refills, the Milwaukee chalk line is a real time-saver that always delivers. • 2mm thick, extra bold lines for maximum visibility • Planetary gear system increases durability • 4/1 gear ratio ensures fast line retraction • Large chalk capacity for longer use between refills • Extra large quick-turn opening for easy refills • Line lock makes it easy to secure line