The U-33 Stage II Kit will expand the U-33 Stage I Set from 3-21 lbs per hand to 3-33 lbs per hand. The U-33 Set will then replace 25 pairs of dumbbells, or 866 lbs of free weights. Increments achieved with the U-33 Stage II Set are; 1, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15, 16, 17, 19, 20, 21, 23 ,24, 25, 27, 28, 29, 31, 32 and 33 lbs per hand.