a wraparound enclosure has two sections , joined by a hinged strap member , which telescopingly engage when applied around an article to form a right rectangular parallelepiped . a microwave detectable tag is secured on the interior to one wall of the enclosure . the sections are interlocked in the closed condition by three pairs of latches and strikes , two on each of three sides of the enclosure . typically the enclosure may be installed around a container holding a cassette of magnetic recording tape . for authorized removal of the cassette and its container from a protected area such as a store , the enclosure is removed by insertion in a releasing mechanism having means for grasping one section while applying spring pressure against the enclosed container through an opening in the grasped section . a lever , upon being depressed , actuates a series of rocker plates with fingers to simultaneously engage and release all of the latches whereupon the enclosure springs open .