T-Lock security hangers locking hardware set for (25) wood or aluminum picture frames plus free HARDENED wrench! ArtRight Prevents theft or shifting of artwork, mirrors, etc. with hidden tamper-proof hardware--great for earthquake zones, windy areas, signage, boats, spacecraft, moving walls and doors. also known as: T Lock, T-Lock, securi-T, art lock, T screw locking system, traditional T-lock system, security picture hangers, hotel picture hangers, frame lock. THE traditional JCAHO standard for hospitals, hotels, restaurants, galleries, offices, etc. BEWARE OF COUNTERFEITS!!! Order direct from the source, for superior components and fast shipment! ArtRight has NO authorized resellers on Amazon. Counterfeit hardware is not guaranteed, and may not be JCAHO certified. free HARDENED steel security wrench included, and pocket US constitution!