Here's what other sites are saying:
The Petzl OK Screw Locking Oval is a symmetric carabiner: For use with pulleys and hauling systems. Symmetrical oval shape: facilitates pulley use, ideal for clipping anchors (easy to flip over).Compact shape: easy to use with one hand. Keylock System (snag-free body / gate interface). Available with manual locking system (SCREW-LOCK). Technical specifications: Strength: 24 kN long axis, 7 kN open gate, 10 kN short axis. Return Policy: Climbing equipment sales are final. In order to guarantee the life saving integrity of the climbing gear we sell -- we cannot accept returns on any life safety climbing or mountaineering equipment.
- Appalachian Outdoors
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.
Perfect for hauling systems and for clipping directly to the accessories used by rope access workers and rescuers.