MX55-s Classic Series, PROMO, Includes Grey MX Stand and Pair OF GREY MX55's Classics.  Limited Qty's available. While supplies last. Replaces over 1,200 lbs. of regular dumbbells with our Micro load / Offset settings. The MX55 Rapid Change Dumbbell System features our unique MX Select patented rack & pinion selection system: compact size, balanced feel and totally secure.