Master Lock 491B Grip Tight Circuit Breaker Lockout, 120/277 V, 1-1/4 In W X 3-1/2 In L

The Master Lock 491B Grip Tight Circuit Breaker Lockout provides a secure solution for isolating high-voltage and high-amperage electrical circuits during maintenance. This device effectively prevents accidental re-energization by firmly clamping onto wide or tall breaker toggles, ensuring personnel safety and operational compliance.

• Features an innovative patented Grip Tight design that secures the breaker with a simple thumb turn and clamping handle for a tool-free installation.
• Constructed with powder-coated steel and reinforced polymer to provide high strength and durability in harsh industrial environments.
• Accepts all Master Lock and American Lock safety padlock shackles and most lockout hasps, allowing for comprehensive multi-person lockout procedures.

This lockout device is ideal for industrial electricians, maintenance contractors, and facility managers who require a reliable, universal-fit solution for locking out large-frame circuit breakers typically found in high-voltage applications.

• Fits 120/277 V circuit breakers
• Compatible with wide or tall toggles
• Dimensions: 1-1/4 in W x 3-1/2 in L
• OSHA 1910.147 compliant

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