Thermostat Guard with keyThermostat covers with 2 keys prevents tampering, damage and unauthorized adjustment of thermostat settings. Keep your controllers away from pesky fingers, protect your thermostat and avoid high bills. Fits Most ThermostatsThe outer size of the thermostat guard with lock is 7.3''*4.7''*2.2'', and the inner size is 7''*4.5''*2'', suitable for most thermostats on the market. It can be used in home, office, church, school and industrial environment etc. Long Service LifeClear thermostat lock box is better than clear thermostatic lock box made of plastic, it will not change color and yellow, and it can maintain the clear visibility of the inside even after long-term use. Punch/No PunchThere are two installation methods of punching and nano glue. If you don't want to damage your walls, you can use nano glue for bonding (no residue), so your walls will always look like new.