Rivet Head Drilling Tool

To drill the rivet, clamp the part to a drill press to keep it from spinning if the drill catches on the rivet and set the drill bit in the drill press so it sticks out the bottom of the tool.  Set the tool on top of the rivet with the side of the tool that fits the rivet head the best since each end is a different size.  Drill through the center of the rivet head then move to the next rivet.  After drilling the short trunnion rivets out you can punch them the rest of the way out with a hammer and punch.