The Owall Carabiner by Petzl is a straight gate symmetric carabiner that is designed for aid climbing. The carabiners oval shape prevents dreaded shifting when you're aided on sketchy placements. The Owall is great for racking because it was designed so gear doesn't bunch together. The snag-free keylock gate allows you to on-clip your previous hook placement without bumping it off the ledge. This device's oval shape facilitates use with a pulley and is easy to flip over making it ideal for pitons or etriers.
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
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