With just the turn of a dial you can automatically change your resistance from 5 lbs. all the way up to 52.5 lbs of weight. No more picking up 30 different dumbbells to get the results you want  this adjustable dumbbell replaces 15 sets of weights! All you need is a SelectTech 552 Dumbbells to transform your body for good. Select the weight you want with the turn of a dial Replace 15 sets of dumbbells (from 5 to 52.5 lbs.) On-demand  full-body strength classes now available on the JRNY? app with your SelectTech 552 dumbbell purchase.