guykerDual Concentric Control Knobs - Dome Volume Tone Speed Stacked Knob Replacement for Electric Guitar or Precision Bass(2 Piece, Golden)

Ron, your answer is confusing; i'll ask differently: if i place this order do i get a) one top and one bottom? or b) two tops and two bottoms?

Does "2 in 1" mean this comes with two sets of concentric stacks? Or is this one set of concentrically stacked knobs?