OPTIMIZED SIZE and SHAPE: Symmetrical oval shape allows optimal loading of devices with a wide section, such as pulleys, ascenders and progress capture pulleys. Fluid interior design limits the risk of having a catch point and facilitates rotation of the carabiner. Keylock system to avoid any involuntary snagging of the carabiner. H-profile contributes to better grip, protects the markings from abrasion and reduces weight. SCREW-LOCK: easy-to-open system. Suitable for harsh environments where dirt, mud, or ice could cause an automatic locking system to jam. Red band provides a visual warning when the screwgate carabiner is unlocked. H-PROFILE: Contributes to better grip, protects the markings from abrasion and reduces weight. KEYLOCK SYSTEM: Avoids any involuntary snagging of the carabiner. FLUID INTERIOR DESIGN: Limits the risk of having a catch point and facilitates rotation of the carabiner. Lightweight aluminum carabiner with a symmetrical oval shape that allows optimal loading of devices with a wide section, such as pulleys, ascenders and progress capture pulleys. SCREW-LOCK: easy-to-open system, locking or not, according to the need of the user. The red band provides a visual warning when the carabiner is unlocked. This system is suitable for difficult environments like ice climbing and mountaineering where contaminants (mud, ice) could cause an automatic locking system to jam.