Trim tabs improve the performance of your boat by adjusting the running angle of your vessel. Trim tabs are either flat plates or vertical blades fitted either side of the boat and attached to the transom. They are used to trim or level the boat, Largest Range of bennett trim tabs and lenco trim tabs. Great Discounts on stabilizers and flaps for boats, offers a wide range of Flaps, to fit any transom configuration from boats 4.5m to 25m