A mounting bracket assembly for securement of elongate items, such as wires, cables, or other bundles items to a support structure. The mounting bracket assembly may include a clamp member defining a first clamp member and a second clamp member joined to the first clamp member by a hinge mechanism. The mounting bracket assembly may also include a locking mechanism, a wedge-shaped pawl having a plurality of teeth disposed within the slotted opening, and a mounting member defining a mounting aperture configured to receive an attachment feature therethrough.