Article and graphics by Petzl.
Petzl designs carabiners in a several shapes and with an assortment locking systems. This allows the user to choose the most appropriate and efficient features for a specific or wide variety of uses. Choosing the wrong carabiner often translates to reduced efficiency and/or comfort. In extreme cases it can reduce the level of safety as well.
DISCLAIMER: The information outlined above is non-exhaustive and customers should refer direct to the Petzl website for proper Petzl equipment uses, misuses, updates and changes to tech notices that will be modified from year to year.