A chalk line is used to mark a straight line over an extended length. You’ll use this primarily when installing the siding and flooring, as well as a few other times.
Our pick is the Milwaukee 100 ft. Aluminum Chalk Reel Kit . This particular set includes blue chalk which is a must, as red will frequently stain whatever it comes in contact with and is very hard to remove. As with several of our other picks, it’s simple, but works great.