Abstract: This invention provides a tool for attaching fasteners to a workpiece that includes a slide within a body and a rod threaded into the slide. The outer end of the rod threads into the floating nut of a fastener assembly with an enlargement on the rod centering the nut and the fastener sleeve. The tool includes a die through which the rod extends. A segmented spacer fits around the die to support the workpiece around the opening through it, while the rod, pulled by the slide, draws the fastener sleeve into the opening. The segments of the spacer then are separated and retracted, exposing the die. Further actuation forces the die against the end of the fastener sleeve to flare it outwardly and form a flange for retaining the fastener to the workpiece.