Arrangement for the relative positioning in height of a hand tool

The hand-held machine tool, e.g. a hammer drill and chisel, has a hose (4) filled with liquid (3) up to a working position (A), a sensor for detecting the hydrostatic pressure difference of the liquid and a signaling arrangement (10) for signaling a height position of the machine tool relative to a reference position (R). The hose runs along a mains cable to the machine tool.