Until now, the only way to adjust your beater stroke action was to tighten the pedal spring. The unfortunate result? Heavy, sluggish action. The Cobra Coil solves the problem by adding a steel return spring. The return spring constantly presses the footboard to its original position, tightening the relationship between foot and pedal. Even better, the Cobra Coil is adjustable to different positions on the Iron Cobra footboard base plate.