1Easy Installation: Breaker lockout adopts one piece design allows for easy installation without the need for tools. The fixed cover increases physical obstruction, preventing the switch from moving to the "ON" position and avoiding electrical accidents. 2Tool Free Installation: Red circuit breaker lock can be easily installed by tightening the stainless steel finger spinning screw onto the breaker handle. The cover is then fastened onto the stainless steel screw to prevent loosening and prevent unintended operation. 3Recommended Safety Accessories: Circuit breaker lock machine is recommended to be used in combination with safety padlocks and safety signs to achieve energy isolation and equipment lockout to prevent accidental operation. 4Wide Application: Breaker lockout device is designed to be compatible with various circuit breaker handle shapes and sizes, this lockout device is suitable for various medium sized built in tripping plastic shell circuit breakers. It ensures the safety of employees during equipment maintenance, preventing electrical accidents. 5Durable And Secure: Tagout breaker box lock is made of reinforced engineering plastic and modified nylon material, providing impact resistance, temperature resistance (50C~+177C), and corrosion resistance.