Our bestselling SelectTech 552 adjustable dumbbells save you space by replacing 15 sets of weights. 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. All you need is the SelectTech 552 Dumbbells to transform your body for good. On-demand, full-body strength classes now available on the JRNY app.