RepairKit

The RepairKit is a tool used to repair damaged parts, you can see the health of the part above the name of the part, displayed as a green line when it is at maximum health. More durable parts can withstand more damage without breaking. To repair a damaged part, you must equip the RepairKit and click and hold the left mouse button on the part you want to repair. This can also change rusty parts back to their original texture.

Malleability
The RepairKit is a tool, it cannot be resized.

Configurables
The RepairKit is a tool, it cannot be configured.

Trivia

 * The RepairKit can has a unique description that contains a reference from Factorio.