25 Individually packed sets of Security Hangers and 1 wrench. Each package contains all of the hardware needed to hang 1 frame. Great for hanging artwork or signage in earthquake zones, windy areas, boats, hotels, hospitals, children's rooms, or anywhere you do not the artwork to be easily knocked about or removed. This traditional security system has been the favorite of hotels, hospitals, and commercial office and retail buildings for decades. We assemble all hardware kits using top-quality screws and other components. Head of T screw inserts into bracket, which is screwed into backside of picture frame. The screw is then turned 90 degrees using special wrench. Recommended for frames up to approximately up to 24” x 36”, weighing up to approximately 25 lbs. (use additional support brackets for heavier/wider frames). Includes all pieces for security hanging of 25 wooden picture frames