The Shelby Crush System in new for 2019 and was designed for the player who loves to get dirty. The Alnico II rail magnets are wrapped by two opposite wound coils producing amazing distortion in a single coil space. The bridge position Humbucker is a full size fat zebra humbucker that is tap-able with the push-pull volume pot. This pickup is full of bottom end and crunch. You get a the best distortion and overdrive whether you're playing speed metal or classic rock AC/DC dirt! However, tap the coil (pull up on the push pull volume knob) and the bridge humbucker reduces its workload to a sweet single coil delivering a modern crunch tone and a warm clean tone.