The 100’ Chalk Box is a precision marking tool designed for accuracy and durability on the jobsite. With 100’ of absorbent cotton line, it creates sharp, visible chalk lines ideal for layout work in construction, masonry, and carpentry. The aluminum housing is shaped for a sure grip, while the self-locking handle and plated anchor ring keep the line steady and secure during use. Its sliding nylon cover allows for quick refills, and it can even double as a plumb bob, adding practical versatility in the field.