Gift Pro 3 Packs Outdoor Military Nylon Belt MOLLE Webbing Buckle Metal Hanging Carabiner Hook .Made of heavy duty alloy metal, it is a Spring Loaded Snap Hook,Keyring is not included .Nylon Heavy duty belt Loop secures with Velcro Closure .It is very well constructed, adjustable secure,high strength and durable. .Can be used with an ordinary belt(Maximum 5cm Width), belt tactics, tactical backpack, is powerful "molle" system expansion equipment. .Perfect for someone who looking for something to easily identify their blood type (or for a family member) as well as a place to keep small items in an easy-to-get-to place. You will never worry about looking for some small items if you own this small clip.