DMM believe they have redefined the carabiner by introducing the concept of a rolling component in the safety chain.
The Roller:
Reduces rope drag significantly.
Large rolling rope radius (11mm dia).
Roller action and size dramatically extends rope life.
Extremely strong and light Hot Forged I beam construction.
Innovative lightweight rescue, hauling and rigging applications.
Meets CE standard EN 12275 for carabiners as well as EN 12278 for pulleys.