A tagging gun or kimble gun is a tool used to attach tags to items of clothing. A tagging gun works by attaching a tag to the garment using aplastic connecter / kimble tag:
Uses for tagging gun
Besides being used to attach tags to garments, a kimble gun can also be used to attach a price tag or barcode to a item of clothing.
Tagging / kimble gun tag
How to use a kimble/tagging gun