The Salvo Susie lock is a key operated mechanical locking device designed to fit on to all UK trailer, emergency brake line connectors. It’s purpose is to prevent re-connection of the air brake hose, thereby immobilising the trailer. When fitted, the Salvo Susie can only be removed with the permit key. The Salvo Susie has an ergonomically designed grip. This enables the lock to be fitted and removed efficiently in wet and cold weather. The grip design provides protection to oil and grease making it ideal for harsh environments.