Electrical
nVent GARDNER BENDER GK-5 4-Piece Home Electrical Tester Set
Product description
The GK-5 household tester set includes four separate handheld instruments: a non-contact voltage detector, a three-light GFCI/receptacle tester with a built-in GFCI test button, a universal battery checker for common cell sizes, and a USB port voltage/wiring indicator. Each tool is housed in a compact molded plastic case sized for pocket or toolbox storage and is intended for basic, everyday troubleshooting.
The non-contact voltage detector is designed to sense AC voltage in wiring and devices without needing direct contact with conductors — a safety-first step before beginning electrical work. The detector is lightweight and pocketable, with a tip for sensing and a simple visual or audible indicator to signal detected voltage at close range.
The plug-in receptacle tester identifies six typical wiring conditions: correct wiring, open ground, open neutral, open hot, hot/ground reversed, and hot/neutral reversed. It uses a three-light pattern to show those conditions and includes a GFCI test button to exercise protected outlets. The unit plugs into standard household outlets and is intended to quickly flag common wiring errors encountered in residential circuits.
The battery checker accepts AA, AAA, C, D and 9V cells to indicate remaining charge under a small load, helping you decide whether to replace batteries. The USB checker plugs into standard USB-A ports to detect the presence of power and indicate basic wiring polarity and voltage via a colored indicator. These two testers are small, plastic-bodied tools that fit alongside the other pieces in the kit.
Packaging note: during a branding transition product cartons may show Gardner Bender or nVent GARDNER BENDER names. The kit contents, specifications and performance are unchanged. The set is aimed at home users needing straightforward diagnostics rather than industrial or lab-grade testing.
Pros
- Covers multiple common household electrical checks
- Simple, easy-to-read indicators for fast diagnosis
- Compact tools that fit a toolbox or pocket
Cons
- Plastic construction can feel fragile
- Not a substitute for professional-grade instruments
- Battery tester can be sensitive to load values
VerdictA versatile, user-friendly kit for homeowners and DIYers who need quick, practical electrical checks. It combines a non-contact voltage detector, a plug-in GFCI/wiring tester with a test button, a multi-format battery checker, and a USB port indicator. Not a replacement for professional tools, but reliable for routine home diagnostics.
Reviews
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matthew c stone 5/5
Simple and effective
Works great for quick diagnostics.
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James R. 5/5
Does the job
Performed as expected. Simple and effective for basic checks.
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Daniel 5/5
Solid, practical set
Very happy with this kit. All four tools work and helped me find a few problems. The USB checker has extra features I didn't expect, and the socket tester was useful for tracking down bad outlets.
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Kindle Customer 5/5
Functional but needs a battery
Everything worked as advertised, though it would be convenient if a small AAA battery was included in the package.
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Austin 5/5
Handy for small jobs
Bought these for last-minute electrical tasks. They arrived quickly and did the job well for simple projects.
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Benoit G. 5/5
Works well and convenient
Handy set, easy to use and reliable for routine checks.
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Rico 5/5
Practical toolset
Very practical and useful for basic household checks.
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tom 4/5
Good for homeowners, not professional gear
Useful for DIY tasks. The non-contact tester senses at several inches and the battery/USB testers cover occasional needs. The GFCI unit didn’t offer big improvements over older models, and the plastic housing feels brittle.
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Lazarus Wald 3/5
Battery checker can be misleading
The battery tester gave a 'good' reading for a 9V that measured around 7V on a multimeter. It applies a relatively heavy load on 9V cells, so readings may not match open-circuit voltages.
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Fabian Espinosa Pozos 5/5
Delivers as expected
Met my expectations and covered the advertised functions. Compact and complete.
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Laura Janeth Hernández Contreras 3/5
Voltage detector quirks — use caution
The non-contact tester requires holding a button to operate, which can be awkward while working. It also beeps on either conductor without indicating which is live, so take care to avoid risky contact.
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Pancho 5/5
Good quality with storage case
Solid build and comes with a small case to keep the tools organized.
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Always on a Budget 5/5
Found a long-standing wiring issue
Bought this after a device flagged a building wiring fault. The tester confirmed an open ground on outlets protected by a bathroom GFCI — something that had gone unnoticed for decades. Used it as I replaced old receptacles throughout the house.
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