Metal balls located inside the lure's impact-resistant plastic body, create an acoustic effect which attracts predators from great distances. Most effective on moderate and fast speed retrieve. Designed specially for rapid stream, it has a high amplitude action, which is especially important while fishing fast predators such as salmon, trout, grayling, chub and ide. Bites often happen when you change the pace of retrieve or move the Kloss from a rapid stream to a calm area and vice versa. Implementation of holographic coating makes KLOSS more visible, and therefore more attractive to predators.