






🔐 Lock it down, power up your safety game!
The Master Lock 493B Grip Tight™ Circuit Breaker Lockout is a compact, durable device designed to securely lock out standard 120V and 240V circuit breakers. Featuring a patented thumb turn and clamping handle, it ensures a tight grip on toggles and accepts all major safety padlocks. Built with powder-coated steel and reinforced polymer, it withstands harsh environments while its narrow profile supports side-by-side lockouts, making it an essential tool for professional electrical safety compliance.

| ASIN | B004J173I8 |
| Best Sellers Rank | #171,434 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #446 in Keyed Padlocks |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Circuit Breaker Type | Standard |
| Circuit breaker type | Standard |
| Current Rating | 1 Amps |
| Current rating | 1 Amps |
| Customer Reviews | 4.6 out of 5 stars 1,235 Reviews |
| Global Trade Identification Number | 00071649229725 |
| Included Components | Electrical Lockout Device |
| Item Dimensions D x W x H | 7D x 13W x 3H centimeters |
| Item Type Name | 493B Grip Tight™ Circuit Breaker Lockout |
| Item Weight | 0.05 Kilograms |
| Item height | 8.5 inches |
| Manufacturer | Master Lock |
| Model | 493 |
| Mounting Type | Panel Mount |
| Mounting type | Panel Mount |
| Number of Poles | 1 |
| Number of poles | 1 |
| Product dimensions | 7D x 13W x 3H centimeters |
| UPC | 071649229725 |
| Unit Count | 1 Count |
| Voltage | 240 Volts |
E**A
Bien material
Me parece de buena calidad y robusto. un poco caro pero contento con la compra
D**N
Read instruction before installing . Adjustment is needed to fit on breaker switch .
Works extremely well . Was impressed . Would buy it again .
A**Z
So Simple And Effective
I bought this breaker lock-out as a reminder to not turn this breaker on, unless you really need it. I use this on the 240V, 50 AMP, Electric Vehicle / Recreational Vehicle outlet that I installed under our breaker panel. Most of the time, this should be turned OFF, but on rare occassion it needs to be turned on. This Lock-out makes it really easy to remember to keep it turned Off when not needed and prevents people from turning it on by accident. The quality of construction is excellent and although I didn't need to use the fitment accessories that came with it, I appreciate that they were included. Nothing is as frustrating as not being able to finish a project beause of a fitment issue. Master Lock had this in mind and they have you covered. Great little product. I would definately buy it again.
S**S
Isolation lock off device
Required to lock off mob isolator. Better designed mcb with locking capability would be better
F**C
Esta bien
Sirve para interruptores pequeños, no para interruptores de potencia como lo que yo necesito. Tiene la presilla muy pequeña y no le entra la palanca del interruptores, debería ser de mayor tamaño y con la boca más grande y profunda. No especifican las medidas de la boca para saber si te sirve para lo que necesitas.
Trustpilot
5 days ago
2 months ago