Small wave machine the winged bat tail. Usually I would make a quad , but this is a custom shape for my friend and he wanted a thruster tri-fin. the wings allow you to turn easier when your foot placement is higher up especially on smaller waves. I feel that the bat tail lets you pivot off the two points like a swallow, but has that point in the middle that sticks on steeper waves. Full nose for paddling and full outline to float through the flats.