The Master Lock No. 491B Grip Tight™ Circuit Breaker Lockout Device is a compact and reliable solution for securing wide or tall breaker toggles commonly found on high-voltage and high-amperage breakers. Featuring the patented Grip Tight™ design, it ensures a secure grip on the toggle with simple adjustments and clamping. Compatible with all American Lock® and Master Lock® safety padlocks, this durable device is built to withstand harsh environments and is easy to carry and store, making it ideal for industrial lockout applications.