Product Description: The Petzl Sm&';D screw-lock carabiner has a compact, asymmetrical D profile that reduces weight without sacrificing strength, perfect for tactical challenges and attaching lots of devices. SmD is a D-shaped locking carabiner that is lightweight and compact and can be used in numerous situations; it is easy to use, even when wearing gloves, and is available in two locking system versions. SCREW-LOCK: easy-to-open system can be locked or not according to need; the red indicator provides a visual warning when the carabiner is unlocked; ideal for harsh environments where contaminants (mud, ice) could cause an automatic locking system to jam. 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. Features: H-shaped profile lessens abrasion, reduces weight and enhances grip when you&';re wearing gloves Keylock system helps prevent involuntary snagging Easy-to-open screw-lock has a red band that gives a visual warning when the carabiner is unlocked great for situations where mud or ice could jam an auto-locking system Highly versatile: D shape is functional for multiple uses, regardless of orientation: attaching a belay system, pulley, or connecting to the end of a lanyard Compact and very lightweight Easy to use and ergonomic: D shape is easy to grip H-shaped frame provides better grip when wearing gloves Keylock system helps prevent the carabiner from snagging during use Hole allows a TIBLOC or a MICRO TRAXION to be connected to the carabiner with a cord, keeping the devices together