Abstract: The invention relates to a tool, tool, in particular a screwing tool (1), comprising a handle (2), a working part (5) that is connected to the handle and that is used to open or close a threaded connection, and a display device (10) that displays a working value, for example a tightening torque of the threaded connection, wherein the display device (10) has at least two representations of the working value, in particular the tightening torque. In order to develop a generic tool in such a way that incorrect operation can be prevented with sufficient reliability, a covering device (17) is provided, which covers at least one working value and/or is designed in such a way that only one working value can be displayed in the display device (10).