modeling-app/docs/kcl/getCommonEdge.md

---
title: "getCommonEdge"
excerpt: "Get the shared edge between two faces."
layout: manual
---

Get the shared edge between two faces.



```js
getCommonEdge(faces: [TagIdentifier]): Uuid
```


### Arguments

| Name | Type | Description | Required |
|----------|------|-------------|----------|
| `faces` | `[TagIdentifier]` | The tags of the faces you want to find the common edge between | Yes |

### Returns

`Uuid`


### Examples

```js
// Get an edge shared between two faces, created after a chamfer.


scale = 20
part001 = startSketchOn('XY')
  |> startProfileAt([0, 0], %)
  |> line(end = [0, scale])
  |> line(end = [scale, 0])
  |> line(end = [0, -scale])
  |> close(tag = $line0)
  |> extrude(length = 20, tagEnd = $end0)
  // We tag the chamfer to reference it later.
  |> chamfer(length = 10, tags = [getOppositeEdge(line0)], tag = $chamfer0)

// Get the shared edge between the chamfer and the extrusion.
commonEdge = getCommonEdge(faces = [chamfer0, end0])

// Chamfer the shared edge.
// TODO: uncomment this when ssi for fillets lands
// chamfer(part001, length = 5, tags = [commonEdge])
```

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