---
title: identifier
framework: pencilkit
role: symbol
role_heading: Instance Property
path: pencilkit/pktoolpickercustomitem/configuration-swift.struct/identifier
---

# identifier

A string that uniquely identifies the tool in the picker.

## Declaration

```swift
var identifier: String
```

## Discussion

Discussion For example, you might use the name com.example.example-company.custom-tool. If you use multiple tool items with the same identifier to create the picker, the picker only shows the first instance of that item.

## See Also

### Identifying the custom tool

- [name](pencilkit/pktoolpickercustomitem/configuration-swift.struct/name.md)