The Dimpling Pliers put a neat countersunk dimple in sheet metal that hides countersunk rivet heads. Simply line up your patch panel (steel or aluminum) over the repair area, and drill a series of 1/8" holes, spaced about 1" apart, through both panels. Remove the patch panel, dimple at each drilled hole, and do the same on the panel being repaired. The special "pilot" self-centers the dimple. Rivet the panel in place, cover the seam with a thin coat of filler, then finish. Dimpler fitted on 10" locking pliers for easy operation.