Due Date Detuning CardsDue Date Detuning Cards 250 Case Product Description: Due Date Detuning Cards are designed to deactivate any and all radio frequency security tags in library books, allowing patrons to exit through security systems without triggering alarms. These precision cut cards are printed on both sides and are indistinguishable from standard card stock. Each card features a 3" x 5" grid style layout that readily accepts stamped dates without smudging, making