A tool, in particular for use as a surgical drill, has a main tool body which, in order to be connected to a tool attachment unit, has a fixing unit which is provided to be at least partly unusable after the main tool body has been detached from the tool attachment unit.The fixing unit has at least one form-fit element, which is provided to accept axial tensile forces in order to axially secure the main tool body to the tool attachment unit. The fixing unit has an assembly direction and a deflection element which points in the assembly direction, and which is provided for movably attaching the form-fit element to the main tool body. It is proposed that the form-fit element and the deflection element have different directions of extension.
