Abstract: A measuring tool comprising two tape measures. Each tape measure may be housed in a casing, and each casing may have an interface surface detachably coupled to the interface surface of the other casing. The measuring tool further comprises a level and a vertical laser. The vertical laser projects perpendicularly downward from the horizontal plane of the level. In a method to square a corner for a structure using the measuring tool, the user selects a first side to be perpendicular to a second side, calculates the diagonal therebetween using the desired lengths of the first side and the second side, attaches the measuring tapes to end points of the first side, tautly draws the measuring tapes to the lengths for the diagonal and the second side, and then marks the location using the level and vertical laser.