The COBRA locking mechanism is patented and guarantees highest safety. A one-sided opening of the lock is not possible even when under load.
Thanks to the identical locking mechanism, all COBRA sizes are compatible. In combination with a fitting webbing, the minimum guaranteed load capacity of the COBRA is 18 kN in loop configuration.
To be up to date please download the current COBRA-compendium http://downloads.austrialpin.at/cobra.pdf