The sides on the 3 piece bait are flat. The thing has no bill but it swims in this incredible S turn action. If you drew the letter S one after the other on top of eachother, that is the action of this bait. It doesn't look like much when you see it, but when you see it swim, it's wild and you can swim it at an absolute crawl or burn it as fast as you can reel and it doesn't roll over.