An installation tool for a self-tapping rivet fastener contains: a body, a movable sleeve, a handle, a single-direction thrust bearing, a switcher, a drive rod, a transmission shaft, a cap, a locking element, and a screw nut. The body includes multiple ribs, two protrusions, two slots, a circular orifice, a stepped fringe, a positioning orifice, a threaded section, and a connection groove. The movable sleeve moves on the body. The handle includes a hollowly circular fitting portion. The switcher includes a coupling portion, a connection flange, a defining hole, and a fitting hole. The drive rod includes a shank, a positioning fringe, and a fixing portion. The transmission shaft includes a threaded orifice, a connecting portion, and a shoulder. The cap is hollow. The locking element includes a threaded extension, a driving portion, and a threaded aperture. The screw nut includes a screwing section and a receiving orifice.

An installation tool for a self-tapping rivet fastener contains: a body, a movable sleeve, a handle, a single-direction thrust bearing, a switcher, a drive rod, a transmission shaft, a cap, a locking element, and a screw nut. The body includes multiple ribs, two protrusions, two slots, a circular orifice, a stepped fringe, a positioning orifice, a threaded section, and a connection groove. The movable sleeve moves on the body. The handle includes a hollowly circular fitting portion. The switcher includes a coupling portion, a connection flange, a defining hole, and a fitting hole. The drive rod includes a shank, a positioning fringe, and a fixing portion. The transmission shaft includes a threaded orifice, a connecting portion, and a shoulder. The cap is hollow. The locking element includes a threaded extension, a driving portion, and a threaded aperture. The screw nut includes a screwing section and a receiving orifice.