A multiple antenna wireless system including a transmitter and a receiver comprises a reconfigurable large antenna array having a plurality of antennas. This multi-row basic cell may be a dual-height cell that spans two rows, or it may span more than two rows. Once the large-diameter skirt member is locked into place, one or more arms of the large-diameter skirt member can be used to apply rotational forces onto the trench plate connector to thereby secure or remove the stud of the trench plate connector from the trench plate. The press member is pivotally mounted to the pivot portion of the case. The skin treater, especially the abrasive tip are made with common material and mass production process so that they are disposable and economic.