West Coast Paracord's Aluminum Carabiners use a high-quality spring-loaded gate. This allows them to be quickly and securely attached to fixed points. It can be used for a hiking, camping, paracord, fishing, backpacks, keyring and many other things. Not suitable for climbing, swinging, hammocks or similar activities. The Aluminum Carabiners are made of a lightweight, durable aluminum material which makes it practical and strong.