# Full-body IK

## Overview

<figure><img src="https://1519747473-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrZsugF4ifwEvaFE7BvLB%2Fuploads%2FCcSJdJAW9nIZD4mMikE5%2Fimage.png?alt=media&#x26;token=26763373-9d51-4fce-b63f-8a9c7cf3af23" alt="" width="440"><figcaption></figcaption></figure>

This modifier has the same exact purpose as [Two Bone IK](https://kinemation.gitbook.io/character-animation-system-docs/character-animation-system/animation-modifiers/two-bone-ik), the only difference is that it applies IK for arms and legs at the same time. Arms and legs have the same set of parameters:

* **Tip** is the hand or foot bone.
* **Target** is the IK target bone (e.g., IK hand\_r or IK foot\_l).
* **Pole Target** is the hint or knee bone.
* **Weight** controls the IK influence.
* **Pole Weight** is the elbow/knee influence.

## Use-cases

This modifier is useful when you don't want to have multiple Two Bone IK features in procedural settings. It also gives you a complete control over all IK bone chains with [Weight Overrides](https://kinemation.gitbook.io/character-animation-system-docs/character-animation-system/animation-modifiers/..#weight-overrides).