# Spring Joint 2D

> Explore the properties of the Spring Joint 2D.

The **Spring Joint 2D** component allows two GameObjects controlled by Rigidbody physics to be attached together as if by a spring. The spring will apply a force along its axis between the two GameObjects, attempting to keep them a certain distance apart.

## Properties

| **Property**                        | **Function**                                                                                                                                                                                                                                                                                                                      |
| ----------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Enable Collision**                | Enable this property to enable collisions between the two connected GameObjects.                                                                                                                                                                                                                                                  |
| **Connected Rigidbody**             | Specify the other object this joint connects to. Leave this as **None** to have the other end of the joint fixed at a point in space defined by the **Connected Anchor** property. Select the circle icon to the right to view a list of GameObjects to connect to.                                                               |
| **Auto Configure Connected Anchor** | Enable this property to automatically set the anchor location for the other object this joint connects to. You do not need to enter coordinates for the **Connected Anchor** property if you enable this property.                                                                                                                |
| **Anchor**                          | Define where (in terms of x, y-coordinates on the **Rigidbody 2D**) the end point of the joint connects to the GameObject.                                                                                                                                                                                                        |
| **Connected Anchor**                | Define where (in terms of x, y-coordinates on the **Rigidbody 2D**) the end point of the joint connects to the other GameObject.                                                                                                                                                                                                  |
| **Auto Configure Distance**         | Enable this property to automatically detect the distance between the two GameObjects and set it as the distance that the joint keeps between the two GameObjects.                                                                                                                                                                |
| **Distance**                        | Set the distance that the spring should attempt to maintain between the two objects. (Can be set manually.)                                                                                                                                                                                                                       |
| **Damping Ratio**                   | Set the degree to suppress spring oscillation. In the range 0 to 1, the higher the value, the less movement.                                                                                                                                                                                                                      |
| **Frequency**                       | Set the frequency at which the spring oscillates while the GameObjects are approaching the separation distance you want (measured in cycles per second). In the range 0 to 1,000,000 - the higher the value, the stiffer the spring. **Note:** Setting **Frequency** to zero will create the stiffest spring type joint possible. |
| **Break Action**                    | Set the action taken when either the force or torque threshold is exceeded.                                                                                                                                                                                                                                                       |
| **Break Force**                     | Set the force threshold which if exceeded, will cause the joint to perform the selected **Break Action**. The default value is set to **Infinity**, which can never be exceeded and therefore the **Break Action** can never be taken while the threshold remains at this value.                                                  |