These tags are similar to the the Sensormatic Super Tags.  The AMD 3040 and AMD 3050 can be used to remove these tags.  These tags are very strong and reliable.

Specifications:

Place of Origin: China

Model Number: XLD-Y5801

Brand Name: XLD

Frequency: 8.2MHz

XLD-Y5801(AM) EAS  TAG

Frequency: 58K

color: white/grey

Packing: 250 pcs

weight:10.8KG