Petzl OK Screw-Lock
Here's what other sites are saying:
The symmetric shape of the Petzl OK Oval Screwgate locking carabiner makes it especially useful when rigging hauling systems.
For use with pulleys and hauling systems, the symmetric OK manual screw-lock carabiner is easy to use with one hand. Symmetrical oval shape facilitates pulley use and is ideal for clipping anchors (easy to flip over). Compact shape is easy to use with one hand. Keylock system (snag-free body/gate interface). Manual locking system (screw lock).
On Sale. Petzl OK Screw-Lock Carabiner FEATURES of the Petzl OK Screw-Lock Carabiner Symmetric shape is ideal for use with belay devices to maximize efficiency no matter which end is closest to the device Oval shape works great with pulleys Keylock system Available with manual locking system (Screw-Lock) or auto-locking system (Triact-Lock)
You're the kind of climber who loves a classic shape and feel, but you're also a gearhead who loves new technology - stock your rack with Petzl's OK Screwlock Carabiners, and you'll satisfy both sides of your brain. The classic oval shape stays in place while the screwgate ensures that you'll stay safe on the big wall.
- Mountain Gear