Klein Tools ET310KIT AC Circuit Breaker Finder Kit with GFCI Tester

Efficient circuit discovery for 90-120V AC systems

The Klein Tools ET310KIT AC Circuit Breaker Finder Kit is designed to streamline electrical diagnostics by helping you identify the exact breaker for outlets or fixtures. The system works with a transmitter and receiver on 90-120V AC circuits, delivering a balance of precision and ease that can reduce guesswork on busy job sites.

Built with practical field use in mind, the receiver provides clear visual cues and audible signals when the correct breaker is located. This helps you confirm the right circuit before performing any work, reducing the risk of unnecessary trips and interruptions.

What you get and how it helps

• Accurate circuit breaker identification with the transmitter and receiver, designed for quick, reliable results
• Clear indications through visual signals and audible cues so you can confirm the correct circuit even in dim environments
• Built in GFCI tester in the transmitter to inspect outlets and wiring as part of safety checks
• Light socket adapter that makes it easier to locate the circuit serving a lighting fixture
• 3 prong to 2 prong grounding adapter for added convenience when testing or wiring verification
• Alligator clip adapter enabling testing on bare wires for flexible diagnostics
• Premium carrying case with a foam insert to keep components organized and ready for transport

Real world use cases you might encounter

On a residential panel, quickly verify which breaker protects a living room outlet rather than searching blindly. For a ceiling light or fan, attach the transmitter via the light socket adapter to confirm the right circuit before maintenance. When wiring or testing bare conductors, the alligator clip adapter expands your options. The built in GFCI tester helps you spot potential issues with GFCI outlets during routine checks, adding another layer of confidence.

In practice, the kit is compact enough to fit into a premium carrying case, and the foam insert keeps every accessory snug and ready. This setup supports organized workflows, less clutter on the bench, and faster setup between jobs.