1Wide Applicability: Pin out standard miniature breaker lock is suitable for all kinds of single stage, multi stage and any miniature breaker (no need to modify the panel or the breaker itself).2Safety Enhancing: Pin out standard circuit breaker lockout device is suitable for industrial electrical isolation areas to protect employees from electrical accidents during equipment maintenance.3Strong Construction: The lock body and the button part are made of reinforced nylon PA, which is wear resistant, anti rust, well insulated and heat resistant, durable and not easily deformed.4Matching Note: Circuit breaker locks are recommended for use with insulated padlocks and safety signage to achieve power isolation, equipment lockout, and prevent misuse.5Easy to Install: Pin out standard circuit breaker lock has its own button snap design, so it can be easily installed by pressing the button manually without any installation tools.