Keira made it back-to-back Illawarra Twenty20 titles, and a third crown in five seasons, with a 37-run victory over Corrimal at North Dalton Park yesterday.
Keira beat Wollongong in last year's final and the 2009-10 decider, and showed their class with ball and bat against the young Cougars.
After they won the toss, the Lions posted 5-140 with a strong batting effort.
Skipper Graeme Batty top-scored with 46 off 43 balls and shared in a 45-run opening partnership in just 5.4 overs with Tim Laws (23).
Jono Cook chipped in with 43 off 41 balls, and Peter Kilby (2-23) was the best of the Corrimal bowlers.
Nick Bell (3-15) took three early wickets for Keira as Corrimal struggled to establish partnerships and the required run rate increased.
From 3-60, Corrimal lost skipper Rob Fisher (14) as wickets tumbled. Joe McDevitt played a lone hand with a fine unbeaten 53 off 37 balls, including two sixes.
Corrimal was dismissed for 103 in the 19th over. Neel Honavar took 3-17 and Troy Coleman 2-17 for the Lions.
"On a good batting deck 140 was par, so it was good effort from the bowlers to get the job done," Batty said.
"We've plenty of options with the ball - medium pace and slow bowling - and had success now for a few years in T20.
"It's a good title to win, but there's a bigger trophy we're aiming for at the end of the season."
Keira took out the second grade and fourth grade T20 grand finals while Northern Districts won the third grade crown.
In second grade Keira (3-113) had a seven wicket win over Northern Districts (6-110).
Lee Clouten (37) top-scored for Norths, and man of the match Darcy Crane made an unbeaten 50 for Keira.
In third grade, Northern Districts had an 18-run win over Wollongong in a high-scoring final.
Batting first, Norths posted 6-153 and they dismissed Wollongong for 135.
Norths' Matt Benstead was player of the final after scoring 23 and taking three wickets and three catches.
In fourth grade, Keira Red (8-148) outplayed Port Kembla Black (57).
In outstanding performances, Paul Constable took 5-22 for Keira and Jack Crane made 59.