Pull station and switches need protection against false pulls or accidental damage; thermostats need protection from being set too high, which can cause utility costs to go up. Solve both issues with the Chase Security perforated metal enclosure, which have been designed to protect thermostats, pull stations, switches and other devices against vandalism, tampering or accidental damage. Chase perforated metal guards include locks with removable keys to prevent outside tampering. Units are constructed of perforated steel welded to a hinged mounting plate.