Here's what other sites are saying:
The Petzl OK Ball-Lock Carabiner is a 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 capture pulleys.
- Mountain Gear
Petzl Carabiners OK Locking Carabiner-Screw Lock M33ASL. This lightweight aluminum carabiner with a symmetrical oval shape allows optimal loading of devices with a wide section such as pulleys ascenders and progress capture pulleys. Available in three locking systems: Scew-Lock Triact-Lock and Ball-Lock.
Made of aluminum for lightweight strength, the Petzl OK Oval screwgate locking carabiner has a symmetrical design that's ideal for loading devices with wide sections such as pulleys and ascenders.
Features of the Petzl Oval Screw-Lock Carabiner Symmetrical oval shape allows optimal loading of devices with a wide cross-section, such as pulleys, rope clamps and mobile fall arresters Aluminum carabiner whose light weight reduces the weight of equipment the worker at height needs to carry May be used with a captive 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 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 and protects markings from abrasion Manual screw-lock with red band provides a visual warning when the carabiner is unlocked
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