how to pick my carabiner?

how to pick my carabiner? A carabiner ( or kacarabiner  is a specialized type of shackle , a metal loop with a spring-loaded gate used to quickly and reversibly connect components, most notably in safety-critical systems. The word is a shortened form of Karabinerhaken (or also short Karabiner), a German phrase for a "spring hook" used by a carabine  rifleman, or carabiner, to attach [...]