The men's fours, the oldest of all the Bowls Tasmania titles first held in 1918-19, witnessed an outstanding final between the Michael Sims-led team, who only progressed after an extra-end decider, and Tim Douce's North-West outfit.

The sixth end proved pivotal where Douce picked up a huge six-shots; never losing the lead again to run out winners by six.

In the women's open fours, Dee Harman's team, which included bowlers from four different clubs, finished eight-shot victors over the Invermay team led by Candice Ayton.

A thriller in the B-grade fours saw the Sandy Bay team led by David Lovett picking up four shots on the final end to record back-to-back titles over the Latrobe foursome led by Peter Rodgers.

Monday will see action in the pairs, with matches at Kings Meadows, Invermay, North Launceston and Trevallyn bowls clubs.

Men's fours: Tim Douce, Greg Douce, Matthew Mitchell (Latrobe) & Chris Murray (Port Sorell) 17, def. Michael Sims, Lachlan Sims, Phil Mundy (Trevallyn) & Chris Dudman (Burnie) 11

Women's fours: Dee Harman (Wynyard), Crystal Brooks (Glenorchy/Rodman), Linda Rose (Port Sorell), Barbara Liddington (Dover) 13, def. Candice Ayton, Kim Saunders, Debbie Lee, Jess McMullen (Invermay) 5

B-Grade men: David Lovett, Bill Mottershead, Ian Salt, Charles Thomas (Sandy Bay) 16, def. Peter Rodgers, Damian Gallagher, Selwyn Sherriff, Robert Sims (Latrobe) 14