no the double axis to adjust the left and right you can onlu adjust from one pin hole to the next pin hole. on the single axis you can make adjustments as little as 1/16 or as much as 35 degrees in either direction. just loosen the holder put the holder where you want and tighten down. sometimes when running divers its nice to be able to make a small adjustment. with the duel axis you have no choice but to go all the way to the next pin hole.