The Metal Shalldus lure by BlueBlue features a vibrating blade and a compact silhouette designed to trigger instinctive bites from fish, especially in shallow water. Its flattened backside causes the lure to rise gradually during retrieval, while the underside is crafted to reduce water resistance, allowing the lure to reach the surface with ease, even at slow retrieval speeds. Despite the presence of a blade, the Metal Shalldus achieves impressive casting distance while maintaining a shallow swimming depth just below the surface. For deeper presentations, anglers can pause before retrieving to adjust the lure's depth effectively.