## Add a tool to inventory

1. On the **Tools Inventory** page, click **Create Tool Inventory**.
2. Enter a **Serial Number** and pick the **Tool / Part** (the tool model). Both are required.
3. Optionally set a **Location**, a **Last Service Date**, and a **URI**.
4. Click **Create**.

## Record a tool’s last service date

Open a tool unit to reach its detail page. In the **Tool Information** card, set the **Last Service Date** with the date picker. The change saves automatically. The **Service Interval** shown next to it is read-only and comes from the tool model’s maintenance interval.

## Track maintenance status and service due

Each tool unit shows a **Maintenance Status** badge and, while in service, its **Service Due** date. ION [derives both](https://docs.firstresonance.io/build-hardware/tools#maintenance-interval-and-status) from the model’s maintenance interval and the unit’s last service date.

For additional tool-availability behavior, such as integration with a tool management system, contact your Customer Success Manager.

## Move, print, or view history

On a tool unit’s detail page, click **Actions** to open the **Tools Inventory Actions** dialog, which has **Move**, **Print**, and **History** tabs. To print barcode labels, use the **Print** tab; for label setup see [Print a label](https://docs.firstresonance.io/build-hardware/labels-and-scanning/printing). To remove a unit, open the **…** menu and click **Delete**.

## Add labels to a tool unit

Labels are shared tags you apply across ION to group related records. For creating and deleting labels in the shared library, see [Labels](https://docs.firstresonance.io/administration/labels). To add a label, click **Labels** (or **Add labels** when the tool unit has none), then type in the **Search or create labels…** box and select it. To remove one, click the **X** on the label.

## Attach files to a tool unit

Attach files such as images, PDFs, and STEP/STP files, up to 100 MB each.

1. On the tool unit, find the **Attachments** section.
2. Add a file by dragging it onto the upload area, clicking to browse, or taking a photo on a device with a camera.

To remove a file, click its delete control and confirm.

When a file is attached through a file-type custom attribute, the delete dialog offers **Remove from attribute** (keeps the file but detaches it) and **Delete permanently**.