A metal engraver's "chasing hammer" has a ball pein on one end- - - -just right for making gaskets. The ball end on mine is about 1/2" in diameter.

www.ebay.com/itm/384906167458?

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!