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Picture 1 of 7
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Master Lock 491B Lockout Circuit Breaker
SecondNatureProducts (1284)
100% positive feedback
Price:
$8.75
Returns:
30 days returns. Seller pays for return shipping.
Condition:
The Master Lock No. 493B Grip Tight™ Circuit Breaker Lockout Device fits standard height and tie-bar toggles typically found on 120 and 240 volt breakers. Grip Tight™ Circuit Breaker Lockout. Adjust to breaker with simple thumb turn and then close clamping handle for a tight grip on the toggle.
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About this product
Product Identifiers
BrandMaster Lock
MPN491B
UPC0071649229725
Model491B
eBay Product ID (ePID)691188234
Product Key Features
Number of Throws1
Suitable ForInterior, Exterior
ColorRed
Number of Ports1
Number in Pack6
Number of Positions1
Number of Phases1
MaterialPlastic
TypeLockout Circuit Breaker
Number of Poles2
Dimensions
Item Height1 in
Weight1.02 lb
Additional Product Features
Timer ControlNone
All listings for this product
Ratings and Reviews
Most relevant reviews
- Jun 09, 2021Top favorable review
Breaker lock out
I don’t actually lock it. I use it on a main breaker to change out sub panels. Other guys are doing the same thing in places where the breakers are not labeled properly. So if someone is flipping through trying to find the one they are looking for, they can see this red lock on the one I’m working on and avoid it.Verified purchase: YesCondition: New
- Apr 03, 2024Top critical review
Well made, but some others are more widely applicable.
The 491B (and 493B) work well for breakers whose handles pivot (i.e. most of them), and the mostly-metal construction seems unlikely to break or wear out prematurely. However, these lockouts do not work well for breakers (such as Wadsworth) which slide between the OFF and ON positions. ABUS lockouts work much better on sliding breakers, but (being plastic) are not as rugged. If I could have only one of these two manufacturers' lockouts, I'd choose ABUS due to the broader applicability.Verified purchase: YesCondition: Pre-owned
- Apr 02, 2019
Safety
What a cost effective way to insure safety. I use it when running my emergency generator.Verified purchase: YesCondition: New
- Nov 30, 2020
Lock Out
Love these safety devices. Works on breakers and light switches. Good quality, works well.Verified purchase: YesCondition: New
- Jun 08, 2023
Breaker lock out devices.
Worked great, just wish the breaker panel door would close with it on, but no problem...Verified purchase: YesCondition: New
- Mar 06, 2026
Exactly what I needed. Includes commonl...
Exactly what I needed. Includes commonly needed accessories to get the best, safest fit.Verified purchase: YesCondition: New
- Jun 16, 2018
Great product
Looks/works great! Will prob purchase again.Verified purchase: YesCondition: New
- Jul 14, 2022
Good product
Installs on breaker.. Comes with instructions for different styles breaker applications.Verified purchase: YesCondition: New
- Jun 05, 2017
Good
Better than the other brands I have used.Verified purchase: YesCondition: New
- Sep 06, 2021
it does the job
it does the job.Verified purchase: YesCondition: New
