Crescent chalk reels are feature rich in order to make every pro's work easier and the 150 ft construction reel is built to handle the toughest jobs. The sit flat case design makes refilling fast and clean with its one-way quick refill valve or slide door opening. An easily accessible hub lock keeps the reel firmly anchored and the end hook/ring combo clips securely into a docking channel, preventing snags when stored. Thicker, compound braided line produces highly visible lines, snap after snap and the 6:1 gear ratio makes retraction surprisingly fast.