Abstract: A rivet setting tool for setting blind rivet nuts has a rotation reversal device including a valve slide and a slide housing that is moveable into a forward position and a rear position, a rotary motor connected to a feed spindle and having a direction of rotation that is controllable by the rotation reversal device, a pressure medium piston/cylinder device that is operable for a rivet upsetting process and confers an axial motion on a threaded bolt via the feed spindle, and a device that actuates the pressure medium piston/cylinder device and the rotation reversal device. The rotation reversal device includes a fixing device that at least temporarily fixes the position between the valve slide and the slide housing, the fixing device engaging with the valve slide.