With the simple turn of the dial you're ready to go with this new remarkable adjustable dumbbell. The innovative locking mechanism secures only the weights that you want, a few seconds is all it takes to change the weight of this dumbbell. This means that you waste less time switching weights and spend more time building muscle to achieve your goals. The PowerTrain Adjustable Dumbbell's ergonomic design makes it the most spaceefficient and flexible strengthtraining option available. With just the turn of a dial, you can automatically change your resistance on this dumbbell from 5 pounds all the way up to 52.5 pounds. It adjusts in 2.5pound increments up to 25 pounds and then in 5 pound increments, enabling you to gradually increase your strength while training with the perfect weight to push your limits. Brilliantly effective while performing super sets and drop sets as there is minimal wastage of time as you go through different phases of your circuit, switching from one exercise to the next. Weight markings on change dial are approximation only. Actual markings may vary from as shown in images.