If you want to get a good strength workout at home, but don't have much space, the Bowflex 552 SelectTech Dumbbells are an ideal solution. Newly designed, the innovative pair of 552 SelectTech Dumbbells combines 15 sets of weights into one using a unique dial system. It's one of the most space-efficient and flexible strength-training options available with its unique and effective design. With just the turn of a dial, you can automatically change your resistance on each dumbbell from 5 pounds all the way up to 52.5 pounds of weight. It adjusts in 2.5-pound increments (up to 25 pounds), enabling you to gradually increase your strength without bulking up.