Maximum Tamper Resistance - Barrel locking switches offer maximum tamper resistance for demanding security needs. Bryant offers the best in pick-resistant switches. Barrel locks have been commonly used for fire system control, restricted access and security equipment. Now, Bryant has designed the barrel lock into its industrial line of AC switches to put you in control. Authorized Access Only - Barrel key switches limit access to give only authorized personnel the ability to operate switches that control lights and equipment. Light switches placed in public or semi-public areas play an important role in security and safety. Whether for schools, institutions, theaters, or public buildings, good lighting provides safety. Using the proper switch increases the security. Superior Performance - Bryant's AC barrel key locking switch is the better lockout. Whether you need to guard against pranks or require a higher level of protection, the barrel lock is the answer. Its round design renders knives, paper clips and other flat objects virtually useless. The round barrel key used to activate the cylindrical tumblers cannot easily be duplicated.