Hard Tags are a reliable more secure anti-theft solution than paper hang tags or sew in label. They are easy to apply, with good performance and are reusable. The most common hard tags consist the hard tag itself and a pin to secure the tag to the product.
Alternatively a lanyard in different lengths can be used when a pin is more difficult to use. E.g. on shoes a hard tag with lanyard is more easy to apply than a pin. But there are also other hard tags such as bottle tags.