The boomerang is a big and important step in your spintop experience. A must have for tricking with tops, explained by Energia.
Energia is a spanish Trademark they released some fine plastic spintops like the fixed Short Circuit, the bearing Elec-trick.
You can find their promotional videos here.
To get their brand known, they recorded a nice tutorials collection with slow motion and zoom effects when needed:
Energia
Desafíos entre amigos, trucos increíbles, que no deje de bailar… Acepta el reto de Energía, peonzas fabricadas con materiales de máxima resistencia y diseñadas para adaptarse a cada tipo de jugador: desde el modelo de iniciación hasta el creado para verdaderos expertos.