An adjustable picture-hanging device (40, 90, 120) for enabling two-dimensional adjustment of a hanging article, comprising: a. an elongated adjustment member having an attachment end and an insertion end; b. an adjustable locking head (14, 70, 57), wherein said locking head (14, 70, 57) and said elongated adjustment member are capable of slideably engaging with each other, said locking head (14, 70, 57) having: i. an aperture for insertion of said insertion end of said elongated adjustment member, ii. a locking protrusion capable of preventing said locking head (14, 70, 57) from moving relative to said elongated adjustment member when said locking protrusion is engaged with said elongated adjustment member, iii. a releasing member that disengages said locking protrusion from said elongated adjustment member thereby permitting said locking head (14, 70, 57) to move in an insertional and withdrawal direction relative to said elongated adjustment member; c. a cable secured to the locking head (14, 70, 57) and being in the form of a loop, which extends from opposing sides of the locking head (14, 70, 57) for securing the cable to a hook or inserting the cable under a wire of the hanging article, first end of the cable for being inserted under the hook or the wire of the hanging article, the locking head (14, 70, 57) for being drawn through the first end of the cable and pulled taught, thereby securing the locking head (14, 70, 57) to the hanging article. a. an elongated adjustment member having an attachment end and an insertion end; b. an adjustable locking head (14, 70, 57), wherein said locking head (14, 70, 57) and said elongated adjustment member are capable of slideably engaging with each other, said locking head (14, 70, 57) having: i. an aperture for insertion of said insertion end of said elongated adjustment member, ii. a locking protrusion capable of preventing said locking head (14, 70, 57) from moving relative to said elongated adjustment member when said locking protrusion is engaged with said elongated adjustment member, iii. a releasing member that disengages said locking protrusion from said elongated adjustment member thereby permitting said locking head (14, 70, 57) to move in an insertional and withdrawal direction relative to said elongated adjustment member; i. an aperture for insertion of said insertion end of said elongated adjustment member, ii. a locking protrusion capable of preventing said locking head (14, 70, 57) from moving relative to said elongated adjustment member when said locking protrusion is engaged with said elongated adjustment member, iii. a releasing member that disengages said locking protrusion from said elongated adjustment member thereby permitting said locking head (14, 70, 57) to move in an insertional and withdrawal direction relative to said elongated adjustment member; c. a cable secured to the locking head (14, 70, 57) and being in the form of a loop, which extends from opposing sides of the locking head (14, 70, 57) for securing the cable to a hook or inserting the cable under a wire of the hanging article, first end of the cable for being inserted under the hook or the wire of the hanging article, the locking head (14, 70, 57) for being drawn through the first end of the cable and pulled taught, thereby securing the locking head (14, 70, 57) to the hanging article.