Petzl Vertigo Wire-Lock v2

The Vertigo Wire-Lock v2 is purpose-built for via ferrata. While its strength ratings are sufficient for other climbing applications, its specific gate design and locking mechanism are optimized for the repetitive clipping required on cables and ladder rungs, rather than the varied demands of sport or trad climbing.

The Wire-Lock mechanism is designed for speed and one-handed operation, which is critical when you are frequently clipping and unclipping on a via ferrata route. Unlike a screw-gate that requires manual twisting, this sliding sleeve system snaps shut automatically, making it much faster to use, though it lacks the permanent locked security of a screw-gate.

Yes, the 25 mm gate opening is specifically engineered to accommodate thick via ferrata cables and ladder rungs without binding. The oversized design ensures you can clip and unclip smoothly without fumbling.

Yes, the keylock nose design eliminates the hook found on traditional carabiners. This allows you to clip and unclip from cables or gear loops without the carabiner getting caught or snagged.

No, you should never use a single carabiner for your primary via ferrata connection. The manufacturer intends for these to be used in pairs as part of a complete, certified via ferrata lanyard system to ensure necessary redundancy.

The S-spine shape is ergonomic, making the carabiner easier to hold and manipulate with one hand. It also helps keep the carabiner oriented correctly in your palm, which improves efficiency when you are moving quickly through a route.