So...the ES920 already comes with a damper pedal which obviously is loose on the ground, but it's heavy enough and doesn't roll all over the place. That said, it's not fixed. And with my HM-5 stand I wanted to finish the effect, and this 3 pedal attachment 'finishes off' the stand, makes the whole thing look "good"!. Also, being completely fixed, there is no longer any possibility of rolling of the damper pedal. For the money, why not.