Tags & Patches are generally used to identify objects or locations, but can also be used as a second RFID technology, depending on the access control environment. Basically made with a high-performance 3M-type adhesive, some models feature a perforation in the center, enabling them to be screwed onto a support, wall or object. CAUTION. To avoid loss of performance or reading problems, avoid positioning them on a metal surface. We can offer you an optional anti-ferrite model to avoid possible interference.