A securing mechanism for a shackle having a pair of opposed legs with an opening at one end of each of the pair of opposed legs to form a pair of opposed openings. The invention may be particularly relevant to cellular systems, such as CDMA, that allow limited imbalance between uplink and downlink path losses, thus enabling the design of an inexpensive repeater with a weaker or non-existent uplink, and which creates moderate signal amplification for selected line-of-sight signals, defeating co-channel interference over a small area. The x-ray absorption members have a wider portion and a narrower portion and the read-out circuitry is accommodated at the narrower portion of the x-ray absorption member. After the initialization, the saved process information is rewritten on the OS data area 12. Such rubber composition allows the manufacture of treads with either a low rolling resistance at the temperature of normal use of the tire, or a high grip when the tread is subjected to thermal stresses exceeding such temperatures.