KK will face Ballinamere in the final in two weeks.
Kilcormac Killoughey secured their place in the final of the Offaly Hurling Championship for the fifth year in a row.
Declan Laffan's side needed extra time to defeat St Rynagh's, as the game finished 1-34 to 2-23 in O'Connor Park.
Adam Screeney returned to action for the first time since June and finished with 0-16 points, while Daniel Hand contributed 1-3.
The three in a row winners will take on Ballinamere in a repeat of the 2024 decider.
KK Manager Declan Laffan says his sides fitness levels showed during extra time:
Declan Laffan spoke to Liam White following the game:
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