RJ45 Ethernet Cable Tester and Crimper Kit - Pass-Thru Termination

Our review finds this RJ45 Ethernet Cable Tester and Crimper Kit best suited for technicians and serious DIYers who regularly terminate CAT5e and CAT6 network cables. The bottom line: it combines Klein Tools' Pass-Thru connectors with a purpose-built crimper and a simple cable tester so users can reliably terminate and verify cables faster than traditional insert-and-crimp methods. The kit saves time by allowing wires to pass through the connector for visual verification, and the included LAN Explorer style tester gives clear LED feedback for common faults, which makes it a practical one-case solution for small installs and field troubleshooting.

Key Features

• Pass-Thru Connectors: Connectors let conductors extend through the plug so installers can visually confirm correct wire order before crimping, reducing wiring errors.
• Pass-Thru Crimper: The fast, simple crimper crimps and trims Klein Pass-Thru RJ45 plugs and is shaped for round STP or UTP cables for consistent terminations.
• LAN Explorer Cable Tester: Single-button testing with fast LED responses identifies Pass, Miswire, Open-Fault, Short-Fault, and Shield conditions for CAT3, CAT5e and CAT6/6A.
• Includes 50 Connectors: A 50-pack of CAT5e/CAT6 pass-thru plugs supplies multiple terminations without immediate reordering, useful for small projects or service calls.
• Wiring Guide on Tool: The crimper includes a wiring guide to minimize wiring mistakes and speed up consistent RJ45 assemblies.

Who It's For

This kit is aimed at network installers, electricians who do low-voltage data runs, and informed DIYers who want a reliable way to terminate and test CAT5e/CAT6 cables on site. The combination of pass-thru connectors, a matched crimper, and a compact tester makes it especially useful for patch panel and outlet terminations where quick visual verification matters.

Less experienced hobbyists who rarely terminate cabling may find the kit overkill versus pre-terminated cables or simple modular crimp tools, and enterprise installers who need large volumes may prefer bulk professional tooling and larger connector supplies.

Pros & Cons

Pros

• Pass-Thru connectors provide clear visual confirmation of wire order, reducing mistakes.
• The crimper trims and crimps in one motion for faster terminations on STP/UTP round cable.
• Tester gives quick, readable LED results for common faults and supports CAT3 through CAT6A.
• Good value for a combined kit that includes 50 connectors and a zippered pouch for jobsite portability.

Cons

• The cable trimmer/tester features received mixed feedback, so some users may prefer standalone advanced testers for deeper diagnostics.
• For very high-volume production use, the 50-pack of connectors will require frequent replenishment.

Specifications

Our Verdict

This Klein Tools Pass-Thru kit is a practical, time-saving choice for installers and advanced DIYers who need reliable RJ45 terminations and quick on-site verification. It bundles matched connectors, a crimper with wiring guide, and an intuitive tester in one portable pouch, delivering strong value for small jobs and service calls, though power users doing very high volumes may want larger connector supplies or specialized testers.

Frequently Asked Questions

Can the connectors be used with both solid and stranded cable?
Yes, the 8 position, 8 contact Pass-Thru plugs are designed to accept both solid and stranded conductors.

What faults does the tester identify?
The tester indicates Pass, Miswire, Open-Fault, Short-Fault, and Shield conditions with fast LED responses.

Is the crimper suitable for shielded cable?
The crimper works with round STP and UTP cables and the kit is certified for PoE+ compatible terminations.