Abstract: An attachment assembly for attaching a theft-deterrent tag to an article to be protected in an article surveillance system, the assembly comprising a strap having a first end and a strap section extending from the first end, the strap section being adapted to loop around so as selectively bring subsections of the strap section adjacent the first end and having a plurality of first engagement means spaced along the length of the strap section. The first end includes a second engagement means adapted to engage with the first engagement means included in a subsection of the strap section brought adjacent to the first end when the strap section is looped around, thereby to form a closed loop of a selective dimension. The first end and strap section are further adapted to include means for receiving a locking means for locking the strap section and first end together.

Abstract: An EAS tag in which the tag is held to an article by an attaching assembly a part of which is releasably prevented from being withdrawn from the body of the tag. The tag body is provided with an arcuate channel through which an arcuate detacher probe can be guided for releasing the attaching assembly part. A spring clamp provides the releasable preventing function and includes jaws specifically adapted to respond to in-plane torsional forces provided by the arcuate probe which is moved through the arcuate channel by rotation to reach the spring clamp. Hand and power actuated detacher assemblies incorporating the arcuate probe are also provided.