TrackMaster are unique, easy-to-use frame hangers that make picture hanging as easy as 1,2,3 while eliminating common "hook and wire" picture hanging problems. TrackMaster frame hangers mount directly on the wall using either nails or screws. The bubble level ensures that hangers are level. The support track on the hanger locks the frame on the hanger and permits side-to-side positioning. METAL-FRAME HANGERS - Each pkg. contains the hanger, bubble level, bottom rail supports, and all hardware necessary for metal-framed pictures. The hanger is 8" wide and will accommodate frames 10" and up to 36” wide, supports 50 lbs. dead weight. For frames 36” and over, two required.