A basin wrench comprising: a telescoping support assembly, including an extension portion, the support defining a distal end and an opposite proximal end, the telescoping support defining a longitudinal axis; a head extending from the distal end of the support; a lower jaw pivotally attached to the head, the lower jaw pivotable about a first axis that is perpendicular to the longitudinal axis of the support; an upper jaw pivotally attached to the lower jaw; a T-bar assembly pivotally and removably attached to the proximal end of the support, the T-bar assembly including a hub defining an aperture extending through the hub and a bar slidingly disposed in the aperture of the hub; a housing generally enclosing the support assembly, the housing defining a fore segment located proximate the distal end of the support and an aft segment located adjacent the proximal end of the support, the housing also defining a contoured gripping region, and the extension portion being seized to be slidingly received within the housing; wherein the hub of the T-bar assembly is pivotable about a second axis that is perpendicular to both (i) the first axis about which the lower jaw is pivotable relative to the head, and (ii) the longitudinal axis of the support; and wherein the T-bar assembly is positionable to a stowed position in which the hub is pivoted about the second axis so that a third axis defined by the aperture of the hub is parallel with the longitudinal axis of the support, and the bar of the T-bar assembly is displaced relative to the hub so that a majority portion of a length of the bar is positioned alongside the housing, and that length portion of the bar contacts the housing along the entirety of that portion a telescoping support assembly, including an extension portion, the support defining a distal end and an opposite proximal end, the telescoping support defining a longitudinal axis; a head extending from the distal end of the support; a lower jaw pivotally attached to the head, the lower jaw pivotable about a first axis that is perpendicular to the longitudinal axis of the support; an upper jaw pivotally attached to the lower jaw; a T-bar assembly pivotally and removably attached to the proximal end of the support, the T-bar assembly including a hub defining an aperture extending through the hub and a bar slidingly disposed in the aperture of the hub; a housing generally enclosing the support assembly, the housing defining a fore segment located proximate the distal end of the support and an aft segment located adjacent the proximal end of the support, the housing also defining a contoured gripping region, and the extension portion being seized to be slidingly received within the housing; wherein the hub of the T-bar assembly is pivotable about a second axis that is perpendicular to both (i) the first axis about which the lower jaw is pivotable relative to the head, and (ii) the longitudinal axis of the support; and wherein (i) the first axis about which the lower jaw is pivotable relative to the head, and (ii) the longitudinal axis of the support; and wherein the T-bar assembly is positionable to a stowed position in which the hub is pivoted about the second axis so that a third axis defined by the aperture of the hub is parallel with the longitudinal axis of the support, and the bar of the T-bar assembly is displaced relative to the hub so that a majority portion of a length of the bar is positioned alongside the housing, and that length portion of the bar contacts the housing along the entirety of that portion