The Ultra O is a very practical biner that works exceptionally well in pulley systems locking versions are also available for added security. It also has hot forged, I Beam panels to maximize the strengthweight balance of the biner. The I beam cross sectional shape adds strength and reduces weight. Despite these practical advantages, most climbers will see it as the perfect racking biner. It can hold a large number of wires without the awkward bunching that tends to happen with a conventional asymmetric biner. The oval shape also means that the wires will slide round easily without snagging. This makes the Ultra O great for racking and carrying gear. Features: a Clean nose oval straight gate biner a Strong and lightweight I Beam construction a Very generous 9.75mm rope radius a Works well in pulley systems a Excellent aid climbing biner a Perfect racking biner Note that this item of climbing safety equipment is non returnable. Please call us toll free at 877 236 8428 or e mail bentgatebentgate.com with any questions.