In the old days, Mopar drag racers got under their cars to set their adjustable pinion snubbers ½ inch from the floor pan. This limited axle wrap and gave better launches by mashing the tires into the strip surface. Now, better launches are the push of a button away! Pressing and holding the Drag button softens shock absorber jounce and rebound to allow more front end rise and rear end squat during launch. This improves dynamic weight distribution for better traction. No more greasy fingers! You just have to remember to re-set it every time you start up the car.