The lightweight Petzl OK carabiner is made of aluminum. It has an oval shape that allows optimal loading of devices with a wide section, such as pulleys or rope clamps. Its fluid interior design and Keylock system facilitate handling.Aluminum carabiner is lightweight to reduce equipment weight carried by the userSymmetrical oval shape allows optimal loading of devices with a wide cross-section, such as pulleys, or rope clampsEasier handling:fluid interior design limits the risk of having a catch point and facilitates rotation of the carabinerKeylock system to avoid any involuntary snagging of the carabinerH cross-section:ensures an optimal strength/weight ratioprotects markings from abrasionMay be used with a CAPTIV positioning bar to favor loading of the carabiner along the major axis, to keep it integrated with the device, and to limit the risk of it flippingSCREW-LOCK: manual screw-lock with red band provides a visual warning when the carabiner is unlockedGate Opening: 0.87" (22mm)Major Axis Strength: 25kN (5620 lbs)Minor Axis Strength: 8kN (1798 lbs)Open Gate Strength: 7kN (1574 lbs)Certification(s): CE EN 362, EAC