This aluminium carabiner has no safety screws, is very strong and very light. It's a quick-release attachment system. When released, it closes again thanks to a powerful spring in the centre of the mechanism. This karabiner cannot be used for personal safety. It does not comply with safety standards. To ensure personal safety, a standard-compliant carabiner must be used. A full range of carabiners for this purpose is also available from Smits-Henin Ropeworks.