Heavy Duty Loop made with 1.5mm thick steel cable tested with 20KG or 40 LB weight. You can cut the steel cable to size with wire cutter or fold behind the picture. You can unscrew the loop anchor to re do the loop size or to loop around beams & rods.
Self-locking Picture Hanging Security Hook Gallery Hook with flat back makes more stable. You just push the lever with one hand to slide up and down along the suspended cable when you release the lever hook would be automatically locked on the cable.