The trailer glad hand lock is constructed of cast aluminum. It completely covers the glad hand on the trailer while the extended body covers the mounting bolts. Protects a trailer's brake system hoses from being connected to the trailer. It also has an extra flange for additional protection of the 2-plate mounting bolts associated with the air hose connection. Great for "Lock-Out Tag-Out" and maintenance. Includes 1 lock, 2 keys and an ID tag.