---
title: "Options"
url: "https://help.maxon.net/c4d/en-us/Content/html/TOOLIRON-MDATA_MAINGROUP.html"
section_path: "Mesh Menu > Iron > Options"
element_id: "TOOLIRON"
group_id: "MDATA_MAINGROUP"
description: "This is the threshold angle. Neighboring edges in the selection will only be ironed if the angle between them is the same as the Angle value or higher."
---

## Options

Options

### Angle

Parameter ID: `MDATA_IRON_ANGLE` · Range: [0..180°]

This is the threshold angle. Neighboring edges in the selection will only be ironed if the angle between them is the same as the **Angle** value or higher.

![Image: 003607.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/003607.jpg)\
Before ironing with **Angle** \< 85° (top) and after ironing with **Angle** >= 85° (bottom).

### Strength

Parameter ID: `MDATA_IRON_PERCENT` · Range: [-100..100%]

![Image: 003606.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/003606.jpg)\
Clockwise from top left: Original; 40%, 100%; after multiple applications.

The **Percent** value defines the strength of smoothing. A value of 0% results in no smoothing at all, while a value of 100% produces maximum smoothing.

### Preserve Boundaries

Parameter ID: `MDATA_IRON_PRESERVEBOUNDARY`

![Image: 044151.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/044151.jpg)\
Left, the initial state; center, after application with enabled Preserve Boundaries option; right, option disabled.

If this option is enabled, object edges - including holes in the mesh and selected edges - will be preserved when the tool is applied. Otherwise these edges will be included in the smoothing process.