Patent ID: 7197832

Claim:
A string line box tool comprising a pair of clam shaped sections joined together by screws or bolts, an opening between said pair of clam shaped sections, a chalk pouch contained within said clam shaped sections near said opening, a string line within said clam shaped sections which string line is extendable from a reel within said clam shaped sections through said opening and retractable to said reel by a lever arm and handle on one of said sections, at least one hole or well in a side of one of said clam shaped sections for locking said lever arm and handle so that said string line is unable to be further unreeled, a L-shaped metal tab or hook connected to a free end of said string line externally of said clam shaped sections, a line block divided into two separate pieces, each separate piece being attached to a substantially flat edge portion of said pair of clam shaped sections such that there is a space between said separate pieces for the string line to be guided and passed therethrough and each separate piece having an elongated portion and a hook shaped protrusion at one end of said separate piece near said opening.