Klein RJ45 Review: Pass-Thru Connector Kit
The Klein Tools 80085 VDV LAN Kit combines a cable tester, crimper, and tone generator into a professional 6-piece set designed for reliable network terminations and fault finding.
By Elvis Dicki
Updated October 21, 2026
Network installation and troubleshooting require tools that are both reliable and efficient. The Klein Tools 80085, often referred to as the Klein RJ45 kit, is a comprehensive 6-piece VDV LAN kit designed for professionals and serious DIYers who work with voice and data cabling. It bundles a cable tester, a crimping tool, Pass-Thru connectors, a tone and probe kit, and strain relief boots into one package. This review analyzes its specifications, design, and real-world utility to determine if it delivers on its promise of fast, reliable connector installations.
At its core, this kit is built for testing and terminating RJ11, RJ12, and RJ45 cables, making it a versatile choice for various low-voltage data applications. The standout feature is its use of Klein’s exclusive Pass-Thru connector system, which aims to streamline the termination process and improve consistency. This in-depth review examines the kit’s performance based on its documented features and user feedback, providing a clear verdict on its place in a technician’s toolkit.
Klein Tools 80085 VDV LAN Cable Tester Kit
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Klein RJ45 at a Glance
| Specification | Detail |
|---|---|
| Model Number | 80085 |
| Kit Style | 6-Piece VDV Installation Kit |
| Primary Function | Cable Testing & Crimping |
| Compatible Cable Types | CAT3, CAT5e, CAT6/6A |
| Connector Types Supported | RJ11, RJ12, RJ45 |
| Key Features | Single-Button Tester, Pass-Thru Connectors, Tone & Probe |
| Power Source | Corded Electric (Battery details not listed) |
| Included Components | VDV Lan Cable, Wire Tester Kit, Modular Data Plugs |
| Item Weight | 1.56 kg |
| Specifications Met | Reach, Rohs3, Ce-emc |
Design and Build
The Klein Tools 80085 kit is presented as a professional-grade set, reflecting the brand’s long heritage in tool manufacturing. The overall design prioritizes functionality and durability for job site use. The compact data cable crimper is constructed for long-lasting performance, handling CAT3 through CAT6A cables. The cable tester and tone generator probe are built with robust materials, with users noting the build quality feels solid and not like cheap plastic. The kit’s organization and portability are facilitated by its components being designed to work together, though the specific case or storage solution is not detailed by the manufacturer.
Performance and Features
Cable Testing Capabilities
The heart of the kit is its single-button cable tester designed for RJ11, RJ12, and RJ45 terminated cables. It performs several critical diagnostic functions to ensure cable integrity. According to the manufacturer’s specifications, it tests for Miswires, Open-Faults, Short-Faults, and Shield status. Fast LED responses provide a clear indication of the cable’s condition, allowing for quick identification of problems. This functionality is reported by owners to save significant time when troubleshooting bad cables in complex setups like server closets or bundled wire runs.
Pass-Thru Connector System
The most distinctive performance feature is the Klein exclusive Pass-Thru connector system. This design allows the individual conductors of the cable to pass completely through the modular plug before being trimmed flush. This method is intended to ensure a consistent and secure termination every time by guaranteeing the wire order is correct and the conductors are fully seated. The included compact crimper is specifically designed to trim and crimp these Pass-Thru connectors, which are compatible with CAT5e and CAT6 cables.
Tone and Probe Tracing
For identifying and tracing cables within walls, conduits, or bundles, the kit includes a tone generator and inductive probe. This tool is designed for simple toning and tracing of open-ended, non-energized wire runs. Owners find it effective for tracking Ethernet or other wires through complex paths, though it is explicitly limited to non-active wires, which restricts its use in some troubleshooting scenarios. Some user feedback indicates a desire for a louder tone output on the maximum setting.
Strain Relief and Organization
The kit includes an assortment of color-coded strain relief boots. These boots serve a dual purpose: they help keep the modular connectors securely attached to the cable, protecting the latch from damage, and they allow for color-coding cables to simplify identification in patch panels or network racks. This is a practical addition for organization in environments with multiple cable runs.
Setup, Support and Ownership
The Klein Tools 80085 kit is designed for immediate use, with some users noting it came with batteries already installed. Setup involves familiarizing oneself with the simple single-button tester and the crimping mechanism for the Pass-Thru connectors. As a physical tool kit, there are no software updates or complex configuration processes. Support falls under Klein Tools’ standard warranty and customer service framework, backed by the company’s long history as an American manufacturer. The kit is a self-contained solution for data cable work; however, for electrical work or other cable types, additional specialized tools would be required. The manufacturer lists an EU spare part availability duration of one year, though specific warranty terms for other regions are not detailed in the provided data.
What Owners Say
Overall sentiment from buyers is strongly positive, reflected in the high rating distribution where a significant majority of reviews are five-star. Users frequently praise the kit for doing exactly what is expected, saving considerable time in troubleshooting and organizing network infrastructure. Specific compliments highlight its effectiveness in tracing wires through walls and its solid build quality. The tone and probe functionality receives positive marks for accuracy, though some practical caveats are noted. Critical feedback from a smaller segment of users includes reports of the included batteries arriving weak or drained, a desire for a physical power switch on the tone generator to prevent accidental activation, and a wish for a louder audible tone. These cons are mentioned alongside acknowledgments that the tool otherwise performs its job well.
Pros and Cons
Pros
- Comprehensive all-in-one kit for data cable installation
- Pass-Thru connector design reduces termination errors
- Simple, single-button cable tester with clear LED indicators
- Effective tone and probe for tracing non-energized wires
- Durable, professional-grade construction
- Color-coded strain relief boots for cable organization
Cons
- Tone generator only works on non-energized wires
- Some users report weak batteries included out of the box
- Tone generator volume can be insufficient in noisy environments
- Lacks a power switch on the probe, risking accidental activation
- Focused solely on data cabling, not a complete electrical toolkit
- Compact design may lack some advanced features of larger units
Who Should Buy It (and Who Should Skip It)
The Klein RJ45 kit is ideally suited for network installers, IT professionals, telecom technicians, and serious DIY enthusiasts who frequently terminate and troubleshoot RJ11, RJ12, and RJ45 cables. It’s an excellent choice for those valuing the consistency and speed of the Pass-Thru connector system and who need a reliable cable tester and tracer in one portable package. It shines in scenarios like setting up office networks, organizing server rooms, or installing home networking systems.
This kit should likely be skipped by those who only occasionally need a simple cable tester without crimping capabilities, as its value is in the complete package. It is also not suitable for electricians or technicians who primarily work with energized power lines or need to trace live circuits, given the limitation of its tone and probe. Those requiring advanced network certification testing with detailed length and crosstalk measurements will need to look for more specialized, dedicated cable analyzers.
Final Verdict
The Klein Tools 80085 VDV LAN Cable and Wire Tester Kit successfully delivers on its core promise: to be a convenient, all-in-one solution for reliable data connector installations and basic fault finding. The integration of the Pass-Thru system, a straightforward tester, and a functional tone generator covers the essential tasks for many low-voltage cabling jobs. The professional build quality and thoughtful inclusions like strain relief boots underscore its design for daily use.
While minor practical drawbacks exist, such as the tone generator’s limitations and some quality control notes on batteries, the overwhelmingly positive user feedback confirms its effectiveness in real-world conditions. For more insights on optimizing your tech workspace with reliable tools, explore our other reviews and guides on tech gear. It represents a smart buy for professionals seeking to streamline their workflow, making it a recommended kit for anyone regularly installing or maintaining structured cabling systems.
FAQs
What types of cables can this kit test and terminate?
The Klein Tools 80085 kit is designed for voice and data cables. It can test and crimp connectors for RJ11, RJ12, and RJ45 interfaces. It is compatible with CAT3, CAT5e, and CAT6/6A cable types using the included Klein Pass-Thru connectors.
Can the tone and probe trace live, energized wires?
No, according to the manufacturer’s specifications, the included tone generator and wire tracing probe are designed specifically for open-ended, non-active (non-energized) wire runs. It should not be used on live electrical circuits.
What is the advantage of Pass-Thru connectors?
Pass-Thru connectors allow the individual wire conductors to pass completely through the plug before being trimmed flush by the crimping tool. This design helps ensure all wires are fully seated in the correct order, aiming to provide more consistent and reliable terminations compared to standard connectors.
Does the kit come ready to use?
The manufacturer description does not explicitly state this, but several buyer reviews indicate that the kit arrived with batteries already installed in the tester and tone generator, making it ready for immediate use out of the box. However, some users reported receiving weak or drained batteries.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.