









🔐 Lock it down like a pro — safety that commands respect!
The Master Lock 491B Grip Tight™ Circuit Breaker Lockout combines a chemically resistant Zenex composite body with a hardened steel core, engineered to secure large and high toggle electrical breakers up to 120 volts. Its powder-coated finish and compact design ensure professional-grade durability and portability, making it an essential tool for safe, compliant electrical lockout in demanding environments.








| Manufacturer | Master Lock |
| Part Number | 491B |
| Product Dimensions | 10.16 x 5.08 x 2.54 cm; 45.36 g |
| Item model number | 491B |
| Size | 14.7 cm x 8.4 cm x 3.4 cm |
| Colour | Red & Black |
| Style | For wide or high toggle switches |
| Finish | Powder Coated |
| Material | Steel |
| Shape | Square |
| Voltage | 120 Volts |
| Item Package Quantity | 1 |
| Measurement System | US |
| Plug profile | DIN Rail Mount |
| Special Features | portable |
| Usage | Outside, Outside; Professional |
| Included Components | Electrical Lockout Device |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 45.4 g |
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