The Master Lock S3823 Grip Tight™ Plus circuit breaker lockout device fits oversized handle circuit breakers (480/600 V). Its lightweight, one-piece design easily and consistently installs without the use of tools. The stainless steel thumbscrew and curved blade provide a tight grip on the circuit breaker handle, ensuring the device remains secure. A fold-down cleat provides enhanced switch throw blocking when needed. It is compatible with a wide variety of circuit breaker handle shapes and sizes.