This circuit breaker lock is made of high-quality materials and is durable. The reinforced nylon used in its manufacturing not only ensures its strength but also increases its longevity, making it ideal for long-term use. Rest assured, this lock will stand the test of time and provide reliable security for your circuit breaker. One of the key features of our medium circuit breaker lock is its compatibility with medium circuit breakers. Whether used in residential, commercial or industrial settings, this lock is ideal for medium-sized circuit breakers. It fits snugly around the circuit breaker, preventing any unauthorized access and ensuring the circuit breaker remains securely locked.