A radio frequency identification, RFID, security system tag is provided. The tag includes an RFID element and a first housing portion. The first housing portion defines an interior and an opening. The interior of the first housing portion includes an inner periphery and a shelf disposed about at least a portion of the inner periphery. The interior of the first housing portion also includes a plurality of protrusions in which the plurality of protrusions extend outwardly from the shelf toward the opening. The RFID element is disposed at least in part on the plurality of protrusions.