... change your resistance on each dumbbell from 5 pounds all the way up to 90 pounds of weight; It adjusts in 2.5 ... bulking up.Feature:1) Weight Range: 5 to 90 lbs (2.27 to 40 kg) for each dumbbell;2) Weight Settings in pounds: 5 ... , 40, 45, 50, ...90pounds;3) Lets you rapidly switch from one exercise to the next;4) Combines 15 sets of weights into ...