# Injector Constructor Arguments

The injector can be constructed with three optional arguments:

| Argument       | Type                            | Required | Default                                   | Description                                                                                                                       |
| -------------- | ------------------------------- | -------- | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| **binder**     | instance or instatiation path   | false    | `wirebox.system.ioc.config.DefaultBinder` | The binder instance or instantiation path to be used to configure this WireBox injector with                                      |
| **properties** | struct                          | false    | structnew()                               | A structure of name value pairs usually used for configuration data that will be passed to the binder for usage in configuration. |
| **coldbox**    | `coldbox.system.web.Controller` | false    | null                                      | A reference to the ColdBox application context you will be linking the Injector to.                                               |

If you are using WireBox within a ColdBox application, you don't even need to do any of this, we do it for you by using some configuration data in your ColdBox configuration file or conventions.


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