Connectors vary according to their shape, size and locking system. The size of the gate opening determines what they can be clipped to.
Aluminum carabiners are made of an alloy that ensures an excellent strength to weight ratio. Since they are lightweight and will not interfere with progression, they can be used on harnesses, at the end of a lanyard or to construct temporary anchors.
The heavier steel connectors are most often used in anchor systems. Quick links can be left in place for extended periods of time.