Punch riveting uses a tool which is fed continuously with wire and makes a joint by cutting this wire to the required length and punching it through the components to be joined. This eliminates the need for drilling holes and using pre-formed rivets. The rivet is subsequently 'headed' and 'tailed' by applying pressure to it, and this can be done either in the same combination tool or separately. Rivet heads can be in a variety of shapes or flush. The entire operation takes about 5 seconds and joint strengths are comparable with those of conventionally riveted joints.