A spool and wedge assembly for attaching a replaceable implement to the nose of an earthworking bucket has a spool and wedge with ramp surfaces causing lateral expansion of the unit upon relative axial movement, and bolting means for drawing the spool and wedge together so that the wedge pushes forwardly against the bucket nose and the spool pushes forward against the implement. A disengagement tool 78 acts between the wedge and the bolt to force disengagement of the ramp surfaces for removal.
