Grantham (41) won his first title in the singles in Dunedin in 2007 and the pairs and the fours this month.
Kernaghan (58) won his first national title in the singles in 2001 and repeated it in 2002. He won the pairs in 2007 and the fours yesterday. He needs one more title for his gold star.
''It was a dream come true,'' Grantham said.
''Just to get one title is a great achievement but to get two and keep focused after you have won one is hard.''
Grantham and Mike Nagy (Taren Point) won the pairs title last Saturday and found it difficult starting the fours the next day.
''It was a bit tough to carry on because we couldn't celebrate that pairs win,'' he said.
''We knew that we had to dig deep and get in the front of the fours team and do our job.''
Grantham excelled with the upshots when he and Nagy won the pairs but in the fours his job was to draw shots.
''That is my job in the Black Jacks,'' he said.
''I had to change my mind-set on the way I played. There are a lot more aggressive shots when you skip the pairs.''
Grantham went through the mind-set exercises that he learnt in the Black Jacks to get back in the drawing mode.
''I have worked hard on my drawing drills and it worked for me in the fours,'' Grantham said.
Kernaghan is a veteran and was able to apply some of his old tricks to help his team win the fours final.
''It was satisfying,'' Kernaghan said.
''When you get it on your own in the singles it is special, but I'm very happy to get all three.''
Kernaghan was a successful international bowler and won a bronze medal in the singles at the Manchester Commonwealth Games in 2002. He no longer has the ambition to play for the Black Jacks.
He was thrilled to help Grantham get his set of national titles and for Mike Nagy to get his second title at the Dunedin championships.
''I'm really pleased for them,'' Kernaghan said.
''They are the ones with the aspirations to play at the top international level. It means a lot to me to help the other guys achieve it, too.''
Kernaghan praised the consistency of ''the guys in my team. It made a huge difference.''
The gold star is not on his radar.
''I don't even think about those things,'' Kernaghan said.
''If those things happen, they happen. I just enjoy competing and love the competitive atmosphere that a nationals engenders.''
NZ titles
The complete set
Tony Grantham (Birkenhead): Singles (2007), pairs and fours (2014).
Mike Kernaghan (Kaikorai): Singles (2001, 2002), pairs (2007), fours (2014).
