Engineered for strength, the BowFlex Results Series 552 SelectTech® Dumbbells provide all the advantages of an adjustable dumbbell in a durable design. Premium metal components, a locking system that keeps weights in place, and a comfortable, non-slip grip set a new standard for durability, so you can lift with confidence for years to come. Quick adjustment dials give you the power to easily switch between weights, from 5 to 52.2 pounds. And the all-in-one, space-saving design replaces 15 sets of weights with one so that you can up the challenge as you get stronger.« Please be advised that due to tolerances in the manufacturing process, individual weight settings may vary from their stated weight values. Membership required for full JRNY® experience. Two-month JRNY Trial offer’s availability is subject to change without notice. At end of free trial, JRNY membership automatically renews at membership rates until canceled.