Here's what other sites are saying:
Many pulleys need an oval-shaped carabiner to work properly. The OK locking carabiner from Petzl is designed for just that. It is also very useful at belays.
PRODUCT FEATURES: Versatile oval symmetrical shape for optimal positioning of devices (pulleys, rope clamps, mobile fall arresters...) Ideal for hauling Keylock system helps prevent the carabiner snagging during maneuvers Red indicator provides a visual warning when the carabiner is unlocked (on SCREW-LOCK version) SCREW-LOCK: the manual screw-lock with red band provides a visual warning when the carabiner is unlocked Material(s): aluminum Certification(s): CE EN 362
- Appalachian Outdoors
Perfect for hauling systems and for clipping directly to the accessories used by rope access workers and rescuers.