ARTEC Quad Effects Controller, the flagship of SpiderTone®, has been designed to simulate four historical drive sounds plus turning any pickup to an "Active" circuit as the natural setting. Position 1=Natural (Active) Position 2=Clean-High Overdrive Position 3=Clean Overdrive Position 4=Traditional Distortion Position 5=Super Gain Distortion It's like having four different pickups or stomp boxes in one small pot! Includes wiring diagram, washers & nut.