COLT via ferrata set and FERRATA.BLOC in combination
The via ferrata set with 3 arms is a combination of via ferrata set COLT.EVO and FERRATA.BLOC. The 3 arms are attached to the in-webbing-brake. In vertical sections the FERRATA.BLOC acts as a brake, only allowing upward movement and locking directly at the point of contact with the wire thus avoiding long falls.
The instructions in the manual let you know what types of Via Ferrata the FERRATA.BLOC is suitable for.