Re: Ball joints!!
 

The steel in the rivets once compressed cold or hot in the "squishing" process takes on a forged quality to it so the are very hard. When I install the rivets I heat them up cherry red and peen them over with a air chisel and dolly (Bugs Bunny style) and in doing so the rivets are almost impossible to drill out (I know as in the learning process I made my share of mistakes on practice parts).