# Master Lock® 491B Grip Tight™ 1-Pole Clamp-On Circuit Breaker Lockout, 120/277 Vac, Red, Steel, 9/32 in Max dia Padlock Shackle

**Brand:** [MASTER LOCK](https://dev.maxsupplyco.com/brands/MASTER%20LOCK)
**SKU:** CON20556
**MPN:** 491B
**Price:** $9.80 · in stock
**URL:** https://dev.maxsupplyco.com/product/master-lock-491b

## Features

- 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
- Use cleats with clamp-on lockout to assure positive restraint for breakers with long sliding switch throws
- Lockout works on switches with or without holes
- Narrow profile permits side by side breaker lockout
- Secure and simple mounting for a solid lockout and grips tight with simple thumb turn and clamping handle
- Fits wide or tall breaker toggles typically found on hi-voltage/hi-amperage breakers

## Specifications

| Spec | Value |
|---|---|
| UPC | 071649229718 |
| Type | 1-Pole Clamp-On |
| Color | Red |
| Brands | MASTER LOCK |
| Material | Steel |
| Width (in) | 3.5 |
| Height (in) | 1.25 |
| Manufacturer | Master Lock Company, LLC |
| Package Quantity | 1/Each |
| Standard Approvals | ANSI/ASSE Z244.1OSHA 29 CFR 1910.147 |
| Manufacturer Part Number | 491B |

## Description

Master Lock® Circuit Breaker Lockout, 1-Pole Clamp-On, series: Grip Tight™, For Use With: Master Lock®, American Lock® Safety Padlocks and Lockout Hasp, 120/277 VAC Circuit Breaker, 1 Padlocks Maximum, 9/32 in Padlock Shackle Maximum Diameter, Red, Steel, 1-1/4 in Height, 3-1/2 in Width, 3-1/2 in Depth.

Features

- 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

- Use cleats with clamp-on lockout to assure positive restraint for breakers with long sliding switch throws

- Lockout works on switches with or without holes

- Narrow profile permits side by side breaker lockout

- Secure and simple mounting for a solid lockout and grips tight with simple thumb turn and clamping handle

- Fits wide or tall breaker toggles typically found on hi-voltage/hi-amperage breakers