The ATS with Billet Turn Lever part numbers includes a billet turn lever in lieu of the standard rocker switch. When you press the turn signal lever, the ATS will activate the turn blinker for a short duration and then self-cancel. This feature is useful for simple lane changes. On the other hand, an extended lever press will yield a longer blinker duration suitable for making left- and right-hand turns. You can manually cancel the turn signal by pushing the lever a second time.