# Hooks

## External String

The image below shows example hooks that could be used for the Flipped Gearbox configurations with the externally run string. The hooks are made of 1/8" thick aluminum and are bolted together using 1"L spacers. These will keep the hooks from bending.

A 3/8" OD shaft is used as the anchor point for the string. Unlike the Non-Flipped Hooks, the shaft is installed outside the tube for all Flipped Gearbox configurations. The position of the shaft is indicated in the table and image down below.

{% hint style="info" %}
When designing your hook, make sure that the anchor point does not cause the string to collide with any of the CF Springs. The dimensions listed in the table below will ensure that the string runs straight up and down from the spool, clearing the CF Springs.
{% endhint %}

| **Base Tube Size** | **Dimension A** |
| ------------------ | --------------- |
| 1-1/2"             | 1.988"          |
| 2"                 | 2.238"          |
| 2-1/2"             | 2.488"          |
| 3"                 | 2.738"          |

![](/files/agePHgIJ78FVMDjz4NWe)

## Internal String

In the image below are example hooks that could be used for hanging. The hooks are made from 1/8" thick aluminum and are bolted together using 1"L spacers. These will help keep the hooks from bending.

A 3/8" OD shaft is installed through both hooks and the 1x1 Output Tube. In this example, this acts as an anchor point for the string.

![](/files/aIlfpwGEOstF1v6UkkGz)


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