Final SALE: For safety reasons, we cannot accept returns on load-bearing Climbing equipment. Sorry for being so mean. Features of the Petzl Sm'D Twist-Lock Carabiner Great versatility D shape guarantees efficiency in any situation, thus responding to multiple Uses: connection to a belay system, to a pulley, or to the end of a lanyard Compact and very lightweight Good handling and ergonomics D shape for good handling H cross-section contributes to better grip when wearing gloves Key lock system to avoid any involuntary snagging of the carabiner Hole allows a TIBLOC or a MICRO TRAXION to be connected to the carabiner with a cord, making these devices loss-proof Available in two locking systems, each for different situations TWIST-LOCK: specific use when quick opening is key (e. g. at the end of a lanyard) and when connecting a GRIGRI to the harness