Klettersteig is the German term for Via Ferrata, the popular mountain routes equipped with fixed cables, ladders and bridges. Klettersteig biners have a wide gate opening which makes them easy to clip onto the safety cables and attachment points. (NB. Only the Quicklock and Locksafe versions are suitable for use with a Via Ferrata lanyard set up.)The large internal volume makes this type of biner well suited to rigging scenarios. It is of course very tough and the zinc plating gives extra corrosion protection.