The Maelstrom was one of the final models from Spintastics with several unique features. While the body were similar to the Tigershark, the halves had weight rings. The sides were a soft rubbery plastic for easier catches. And the bearing had a bearing "shield" around it ... to act as a string guide. Starburst response and bearing axle. There were a couple versions of the Maelstrom with different graphics.