Will these fit double pole breakers or just single pole?

It would fit over one side of most 2-pole breakers, which would, in effect, lock out the breaker. This does not fit some larger 277V breakers.

Can this be knocked off with a hammer or pried off with a screwdriver? I need it to be secure!

All the person you’re trying to prevent from using the electrical needs to do is remove the entire circuit breaker that has the lock on it and replace it with another breaker to continue to use electricity. Not even locking the wall panel will help, the cover is held on with 4 screws Your only opinion you have left is to place a metal cap over the breaker switch and connect the metal cap to the 220 feed leading into the panel

how wide does the jaws open?

It's ment for a breaker. It will fit any breaker from the main power to the 15 and 20 amp ones

i need a device to lock breaker in on position to insure our church organ is not turned off accidently can i reverce this device to use it that way???

This device is probably not what you want---it is intended to lock a circuit breaker in the "OFF" position for safe-maintenance situations...they make a breaker lock intended for locking a breaker in the "ON" position...it is intended for applications such as you describe---an alarm system, eg.,...the breaker will still trip if overloaded, but cannot be turned off by accident or un-authorized personnel.

Desertcart Logo

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

121 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Specifications

ASIN	B004J173I8
Best Sellers Rank	#266,993 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #257 in Lockout & Tagout Devices
Brand	Master Lock
Brand Name	Master Lock
Circuit Breaker Type	Standard
Customer Reviews	4.6 out of 5 stars 1,272 Reviews
Global Trade Identification Number	00071649229725
Item Weight	0.05 Kilograms
Manufacturer	Master Lock
Model Number	493
Mounting Type	Panel Mount
Part Number	493B
UPC	071649229725
Voltage	240 Volts

Reviews

E**A

Bien material

Me parece de buena calidad y robusto. un poco caro pero contento con la compra

3.04.2023

P**E

No more accidents

7.01.2026

J**C

Good for the price

28.02.2026

I**Z

Buen precio para el material

6.06.2025

S**S

Isolation lock off device

2.06.2021

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

121 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

Master Lock Grip Tight Circuit Breaker Lockout, Standard Toggle

Details

Details

Description

Specifications

Reviews

Common Questions