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 user Symmetrical oval shape allows optimal loading of devices with a wide cross-section, such as pulleys, or rope clamps Easier handling: 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 cross-section: ensures an optimal strength/weight ratio protects markings from abrasion May 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 flipping SCREW-LOCK: manual screw-lock with red band provides a visual warning when the carabiner is unlocked Gate 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