Abstract: The present invention relates to a tool carrier unit (1) for attachment to an agricultural vehicle. The tool carrier unit comprises a tool carrier (2) for carrying at least one tool for an agricultural purpose, and a height adjustment assembly (5) comprising at least one linear actuator (6, 6?) coupled to the tool carrier such that the tool carrier can be raised and lowered. The height adjustment assembly (5) comprises a linear bearing (10) comprising a guide rail and a slide element movably engaged to each other so that the guide rail and the slide element are allowed to move relative to each other in a linear movement along the length of the guide rail. The tool carrier unit (1) comprises at least one mounting bracket (12, 12?) comprising coupling means (16) for mechanically coupling the tool carrier unit to the vehicle.