ALL-IN-ONE SOLUTION – Hanging tool allows you to visualize nail/hole placement, mark the wall precisely, and position the picture correctly the first time..Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. VERSATILE USE – For use on single- and dual-mount frames up to 16 in. x 20 in. and up to 6 lbs. BUILT-IN BUBBLE LEVEL – Ensures an even, professional-looking display. ON-BOARD STORAGE – Keep accessories like nails, screws, and fasteners together in one convenient location. INCLUDES – (1) BDMKIT101C MarkIT picture hanging tool, (30) fasteners.