How to choose a crimping tool for RJ45 connectors and how to use it? A guide with examples of Lanberg tools.

Added: Tuesday, 10/7/2025


Crimping tools for connectors are IT tools essential for building computer and telecommunications networks. They allow installers to easily and quickly crimp various types of cables. Special crimping tools for RJ45 (8P8C) connectors are used for properly attaching internet cable ends. Various models are available on the market, differing in size, additional features, and compatibility. Which tool to choose and how to use it in practice? We explain using the example of durable and ergonomic RJ45 crimping tools from the Lanberg brand. 

Tool for crimping network cables

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RJ45 Crimping Tools from Lanberg – tools tailored to diverse needs

In the offer of Lanberg – a brand specializing in telecommunication solutions, you can find various models of RJ45 crimping tools. A comparison of their key features is included in the table below. In the further part of the article, we take a closer look at each of these models. 

Lanberg table

1 - RJ45 Crimping Tool Lanberg NT-0201

RJ45 Crimping Tool Lanberg NT-0201 is a basic tool for installers of telecommunication and IT networks. It features dual arms and additionally – a wire stripper for flat and round cables. It is characterized by lightness and versatility. It is suitable for crimping RJ45 connectors, as well as RJ9, RJ11, and RJ12. A special ratchet mechanism ensures precise pressure. This model is recommended for professional installers and DIY enthusiasts. 

2 - RJ45 Crimping Tool Lanberg NT-0202

The NT-0202 crimping tool is the lightest tool in the Lanberg crimping tool range. It has dual RJ45, RJ12, RJ11 Crimping Tool NT-0201 arms and a built-in wire stripper for flat and round cables. Like the previous model, it is characterized by versatility. It is suitable for crimping RJ45 connectors, as well as RJ11 and RJ12. A special ratchet mechanism supports precise pressure. Recommended for professionals and DIY enthusiasts. 

3 - RJ45 Crimping Tool with Cable Tester Lanberg NT-0203

RJ45 Crimping Tool + Cable Tester Lanberg NT-0203 is an advanced, versatile 2-in-1 tool. It allows crimping modular RJ45 connectors, but also RJ11, RJ12, and RJ14. A cable tester is built into the handle of the crimping tool. Additionally, the tool has blades for trimming wires and blades for removing the outer insulation from flat cables. The device is battery-powered (4xLR44). It is a frequent choice of professionals. 

4 - RJ45 Pass-Through Crimping Tool Lanberg NT-0204

The Lanberg NT-0204 crimping tool is a versatile tool with dual arms, which is great for crimping all types of RJ45 and pass-through RJ45 connectors, as well as RJ11 and RJ12. A special ratchet mechanism prevents inaccurate pressure on the connectors. Additionally, the tool has a built-in wire stripper. The set includes interchangeable blades. Thanks to its simple design and multifunctionality, the Lanberg NT-0204 crimping tool meets the expectations of both amateurs and professionals. 

Which RJ45 Crimping Tool to Choose?

It is difficult to unequivocally indicate which Lanberg RJ45 crimping tool will be the best for you, as all described models meet the expectations of professional users regarding quality of workmanship, ergonomics, and durability. The choice therefore depends on the individual needs and requirements of the installer. The most important thing is that the crimping tool is:

  • compatible with RJ45 connectors (of course, it may also fit other types of connectors);
  • comfortable to use, supporting precision, comfort, and safety at work;
  • solidly made – from high-quality, wear-resistant materials;
  • appropriately equipped – consider whether you need a multifunctional tool, e.g., with a cable tester or wire stripper. 

How to Use an RJ45 Crimping Tool?

First of all, remember that the crimping tool should only be used according to its intended purpose, following the manufacturer's instructions for the specific model. When using the tool, special care should be taken due to sharp elements. 

RJ45, RJ12, RJ11 Pass-Through Crimping Tool NT-0204The crimping process begins with preparing the cable. It should be cut evenly and thoroughly cleaned, with the outer insulation removed about 2 cm from the end. Make sure that the wires are properly arranged and straightened. The next step is to crimp the connector. Insert the wires into the appropriate slots, avoiding bending and kinking. Now proceed to crimp the connector. Insert the connector with the cables into the RJ45 crimping tool. Crimp the connector onto the wires, ensuring that the crimping tool exerts even pressure on all pins. Finally, check the connection. Done!

FAQ 

1. Which RJ45 crimping tool is the best?

It is impossible to give a definitive answer to this question. There are various models of RJ45 crimping tools available on the market. The tool should be matched to the individual needs and expectations of the installer. It is worth paying attention to the versatility of the crimping tool, ease of use, solid construction, and additional equipment, such as a wire stripper or cable tester.

2. Are Lanberg crimping tools good?

Lanberg is a renowned manufacturer of telecommunication solutions. Its offer includes various models of RJ45 crimping tools. Each meets the expectations of professionals regarding quality, ergonomics, and durability. Most have additional features.

3. What is a crimping tool with a cable tester used for?

A crimping tool with a built-in tester allows you to immediately check the quality of the connection, which significantly facilitates installation work and saves time. Such a tool is particularly recommended for professionals performing larger network installations.

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