Master Lock Red Electrical Box Circuit Breaker Lockout, Tagout Breaker Box Lock for Standard Single and Double Toggles, 493B

Literally, this device can be a life saver. It will prevent unauthorized energization of a circuit. A must have for anyone working on a circuit or on a circuit that needs to remain de-energized.

Simple to use and reliable. Turn to knob until the pads touch both sides of the breaker, close the cover and it clamps down. Simply, easy, reliable.

Works with all single, double and triple pole standard breakers. Adjustable finger screw allows for a snug fit on all types and brands.

Works as designed, does lock out breaker with a padlock, I used it to lock out the main breaker when connecting my Generator. I will buy some more

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.

This is simple to use and highly effective. For roughly $10, it gets the job done and then some. Locally I tried to find something like this and it was $50. It clamps onto the breaker switch (whether it is on or off) and then the swing arm further tightens it. IT then has a loop you can use a zip tie or a small padlock. It can be pried off (with significant effort) but what you are really trying to do is make it difficult to "accidentally" move the breaker from the position you want.

I'm an electrician, I use these whenever I work on a job. It keeps someone from flipping on the breaker while I'm working on the circuit. They work perfectly.

This is a very secure breaker lockout. However, this will only work on breakers in a single row, not if there are breakers on the opposite side. When the opposing breaker is in the on position, this device hits the opposing breakers handle wanting to turn the breaker off. To bad it’s not designed to be mounted with the lock facing to the right instead of the left.