Klein Tools 80064 Circuit Breaker Finder Kit
A three-piece electrical test kit built around a GFCI-rated digital breaker finder that auto-calibrates — the fast way to map a panel and check outlets.
Best for Electricians, handypeople, and homeowners tracing circuits and troubleshooting outlets.
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Highlights
- Digital breaker finder with auto-sensing that adjusts to distance automatically
- Works on GFCI circuits, where cheaper finders fail
- Includes a receptacle tester that flags common wiring faults
- Adds a non-contact voltage tester for safe live-wire checks
- Comes in a durable carry case so the set stays together
Before you buy
- Like any finder, expect occasional adjacent-breaker false hits on crowded panels
- The non-contact tester is a screening tool, not a substitute for a meter
- Batteries not always included — check before your first job
Quick take
Mapping an unlabeled panel by flipping breakers and running back and forth is a miserable way to spend an afternoon. The Klein 80064 kit fixes that. Its digital breaker finder pinpoints which breaker feeds a given outlet, and Klein bundles in a receptacle tester and a non-contact voltage tester so you can check wiring and confirm dead conductors from the same case.
The finder does the work
The standout is the auto-sensing transmitter/receiver pair. You plug the transmitter into the outlet, sweep the receiver across the panel, and it automatically adjusts sensitivity based on how close you are — so you’re not constantly turning a dial to narrow it down. Crucially, it works on GFCI-protected circuits, which trip up a lot of budget finders. Audible and visual alerts make the match obvious even in a loud mechanical room.
More than a finder
The receptacle tester is the piece you’ll use daily: plug it in and its lights tell you instantly whether an outlet has an open ground, reversed polarity, or an open neutral. The non-contact voltage tester is your quick “is this live?” check before you touch anything. Together they turn one purchase into a genuine troubleshooting set.
Before you buy
No breaker finder is perfect — on a densely packed panel you may occasionally get a strong reading on the breaker next to the real one, so confirm with the outlet. And treat the non-contact tester as a first-pass screen; for verification, nothing replaces a proper multimeter.
Verdict
The best-value electrical test kit for anyone who works in panels. The GFCI-capable finder alone justifies it, and the extra testers make it a standout.