The Sinking Series is designed specifically for fishing with Forward Facing Sonar. The magnet weight transfer system is used to cast quickly to the distance where bass are located, and the Sinking Ratio is set higher to reach the target depth faster. When you find a bass on the Sonar, cast quickly, let it sink quickly, and let the lure pass in front of the bass as many times as possible. This is the best way to catch fish and win tournaments. Lightning Pointer 100DD MG-S has magnet weight transfer system. Not only does this allows all the weight moving for greater distance, but it also creates a better swim action as the ball attaches to the magnet.