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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.

Find the right breaker at the panel without the guesswork - battery included and ready to use.
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 →

About Product Overview

Tracing which breaker feeds which outlet used to mean flipping switches and shouting down the basement. The Klein Tools ET310 Circuit Breaker Tester cuts that out - plug it into the outlet or fixture you're working on, then sweep the panel until it flags the right breaker. It runs on a 9-volt battery, which is included, so it's ready to work right out of the box.

  • Brand: Klein Tools, model ET310
  • Circuit breaker tester for identifying the correct breaker at the panel
  • Includes 9-volt battery
  • Color: Black/Orange
  • Backed by a 2-year warranty

The Details Specifications

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

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
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$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
100% Authorized & Genuine — Our Guarantee →
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.

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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 familiar 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.

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