Selecting the correct roller guide is a critical safety and efficiency consideration. To make the best choice, consider these factors:

1. Application: Identify the specific point where you need the guide. Is it a manhole entry, a conduit entry, or a sharp corner? This will immediately narrow down your options.

2. Cable Diameter: Ensure the guide is sized to accommodate your cable. The rollers and the overall opening must be wide enough to allow the cable to pass through freely without binding.

3. Working Load Limit (WLL): The guide must have a WLL that exceeds the maximum tension expected during the pull. Using a guide with insufficient capacity can lead to a catastrophic equipment failure.

4. Material: The material of the rollers (e.g., steel, aluminum, nylon) can affect its performance and suitability for the job. Steel is highly durable for heavy pulls, while nylon is lighter and non-conductive, making it a good choice for sensitive or smaller cables.