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The Master Lock No. 491B Grip Tight™ Circuit Breaker Lockout Device fits wide or tall breaker toggles typically found on hi-voltage/hi-amperage breakers. The innovative patented Grip Tight™ design effectively locks out circuit breakers with a simple thumb turn and then close clamping handle for a tight grip on the toggle. Device accepts all American Lock® and Master Lock® safety padlocks and most lockout hasps for full lockout. Durable construction stands up in harsh environments and compact design is easy to carry and store.

  • Grip Tight™ Circuit Breaker Lockout
  • Fits wide or tall breaker toggles typically found on hi-voltage/hi-amperage breakers
  • Innovative patented Grip Tight™ design effectively locks out circuit breakers
  • Adjust to breaker with simple thumb turn and then close clamping handle for a tight grip on the toggle
  • Great strength with universal fit
  • Compact lockout device is easy to carry and easy to store
  • Accepts all American Lock and Master Lock safety padlock shackles and lockout hasp diameters
  • Durable construction with powder coated steel and reinforced polymer for operation in harsh environments