Stay in shape with the Bowflex SelectTech 552 Adjustable Dumbbells Syncs. 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. The Bowflex SelectTech 552 dumbbells are designed to replace 15 sets of weights. You can use these strength-training dumbbells to transform your body. They re ideal for arm exercises such as rows curls incline presses pullovers deadlifts lateral raises and more. They provide a premium and comfortable grip and are space efficient making them an ideal addition to your home gym. The Bowflex SelectTech dumbbells also have durable molding around the metal plates that provide a smooth lift off and quieter workouts.