Roundish shaped screwgate biner.
Big wall climbers, stop looking at those anodized new-fangled 'biners and pick up the time-tested Black Diamond Oval Carabiner. The Oval Carabiner's rounded design eliminates 'biner shift on aid placements. The Black Diamond Oval has remained unchanged for years. After all, why would you mess with something so simple and functional?
• Uniform shape prevents shifting
• Large carrying capacity
• Proven symmetrical design
• Type X or Oval Connector