The Halco GT Giant Trembler Lure is one of the most rugged and robust lures of its type in the world. The noise of the rattles and the tight fast action make this lure a great trolling lure for pelagic species. Troll at 3 - 15 knots, although 7 - 9 knots is optimum for Tuna and Mackerel. Use this lure to troll your favourite spots or use it as a searching lure and cover vast tracts of ocean - quickly. To obtain maximum speed the towing point may require tuning. If at high speed the lure track a little to the right (when looking at the lure), retrieve the lure and use pliers to bend the towing point to the left, not more than 0.25mm at a time. As with tuning all fixed towing point lures - the rule is bend the towing point in the direction you want it to swim.