A chalk line is a very simple tool that performs an essential task: it provides a perfectly straight line that is temporary to almost permanent. At Keson, we’ve taken the time to learn a lot about chalk line reels from end-users. As the only US manufacturer of chalk and chalk line reels, we are in a unique position to interact and respond with the people who build in and build up our communities. Somewhere between a felt-tip marker and a chisel tip marker, lies line left by our bold string. This string is more often used in higher traffic areas and outdoors.