IRWIN Tools Precision Chalk Reel, 100-Foot (2031322) With a premium, 1 mm braided polyester / nylon line, this is the ideal marking reel for detail finish work. Designed with a smooth 3.5:1 gear system, this advanced chalk reel retrieves line up to 3.5 times faster than traditional models. Aluminum plate-housing and large steel handle provide extra strength for unrivaled durability. The tool-less EZ-access door allows for easy entry into the back of the chalk real to change or clean line.