Leviton's Extra Heavy-Duty AC Key Locking Switch (model 1221-2KL) provides a robust and secure solution for environments demanding restricted access and reliable performance. Designed for public use areas like schools, universities, and pediatric facilities, this switch prevents unauthorized operation by requiring a mating key. It boasts a self-grounding feature, back and side wiring options, and is constructed with an extra heavy-duty industrial specification grade. With a 10-year limited warranty and compliance with UL 20 and ANSI C-73 standards, the 1221-2KL ensures long-lasting durability and safety. Its robust construction and secure locking mechanism make it a preferred choice for applications where tampering prevention is critical.