Skip to content
Free Local Pickup ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted American Hardware Brands
FAQ Shipping & Returns Order Lookup Contact Account
Klein Tools Circuit Breaker Tester
Klein Tools Circuit Breaker Tester

Klein Tools Circuit Breaker Tester

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Discover the Klein Tools Circuit Breaker Tester, your essential tool for precise circuit testing with automatic ranging and user-friendly features.
Klein Tools MPN ET310
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $50.99, average $59.99
In-Store Exclusive

This one's worth the trip to the store.

Brands like Weber, Milwaukee, Yeti, and DeWalt restrict where their products can be sold online — and for good reason. In-store buyers get authentic products, full manufacturer warranty, and access to pricing that simply isn't allowed to be advertised on the web.

  • Authorized dealer network · Full manufacturer warranty & support
  • Guaranteed authentic · No counterfeits, no gray-market resellers
  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

The Klein Tools Circuit Breaker Tester is an essential tool for electricians and DIY enthusiasts alike, designed to streamline your circuit testing process with unparalleled precision. With its automatic ranging capability, this tester simplifies the task of identifying circuit breakers by providing accurate readings without complex settings.

Key features of the Klein Tools Circuit Breaker Tester include:

  • Compact Design: Measures only 2.2 inches in height, making it easy to store and transport.
  • Battery Included: Comes equipped with a 9-Volt battery, ensuring you’re ready to use it right out of the box.
  • Data Hold Function: The data hold feature allows you to easily capture and view measurements without having to take your eyes off the circuit.
  • UL Listed: You can trust the quality and safety of this tester, as it meets rigorous safety standards.

Whether you're a professional electrician or a homeowner conducting repairs, the Klein Tools Circuit Breaker Tester is your go-to solution for efficient circuit testing. Its user-friendly interface and reliable performance will save you time and enhance your productivity.

Don’t miss out on this indispensable tool for your toolkit! Order the Klein Tools Circuit Breaker Tester today and ensure you have the best in circuit testing technology.

The Details Specifications

Brand Klein Tools
SKU 3004021
UPC 092644692406
Unit 0
Case Pack Quantity 6 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 2 × 7 × 11
Weight 1 lbs
Cubic Feet 0.08944 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Free Local Pickup Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide From our distribution network
Independent Network Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network →
About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare