Honeywell #TG510A1001, Small Universal Thermostat Guard - Clear Cover (T87)
Enclose and protect wall thermostats against tampering, damage and unauthorized adjustment of thermostat settings.
Unique double-wall construction provides extra measure of tamper-resistance
Used in both new and existing applications
Tamper-resistant lock; key cannot be removed unless in locked position
All models mount vertically or horizontally on wall or exposed junction box
Vents in guard base allow airflow for optimum thermostat performance