Abstract: An operating part, essential to the starting-up or use of a power-operated device (1), e.g. driven by an engine or a pressure-medium, is made in the form of a tool-carrier (4). Permanently attached to the tool-carrier (4) is at least one tool, preferably a set of tools, specifically intended for the maintenance, cleaning, or the like of the device. However, the operating part constituting the tool-carrier (4) is arranged detachably upon a functional element (2,3) of the device (1). It is therefore scarcely possible for the tool to be lost after it has been used, since the device (1) only becomes serviceable again (i.e. may be driven or guided by the operator) after the operating part of the device (1) which has been removed, and which constitutes the tool-carrier (4), has been replaced.