The Guardian Fall Protection double-locking carabiner with 3/4 in gate (made from either steel or aluminum) is specially designed to be both supremely durable and easy to use. The gate is certified to withstand loads up to 3600 lb, is self-closing and self-locking, and can be opened with just one hand. All double-locking carabiners are compliant with the most current ANSI and OSHA regulations.