TUMBLER SWITCH - industrial-grade, heavy-duty Lock-Type (Key-Operated) Tumbler Switch.In real-life commercial and industrial facilities—such as school corridors, hospital wings, public transit hubs, and correctional facilities—this specialty switch acts as a secure power control interface. Instead of a standard toggle lever that anyone can flip, it features a flush, slotted mechanism that requires a specific Pass & Seymour master key to actuate, preventing unauthorized personnel from tampering with building systems.The following layout is formatted as a single row segment to paste cleanly into a single vertical spreadsheet column cell:Lock-Type Key-Operated Tumbler Switch Module: A heavy-duty, commercial-grade single-pole locking switch mechanism rated for 20 Amps at 120/277 Volts AC, featuring an enclosed flush cylinder input designed to prevent unauthorized tampering or operation. Unit Sourcing Compatibility: Public school hallway light systems, prison facility power control hubs, hospital wing utility circuits, and industrial workshop equipment panels requiring secure Pass & Seymour master key access control.