Adjustable dumbbell: Get a dumbbell weight set. Design: Specially designed grip allows you to have a more rigorous exercise, without injuring yourself. Adjustable: The dumbbells include adjustable weights allowing for a varied and effective workout, which means you won't need to buy new weights as your strength increases! Easy to use: Easy to use locking nuts allow the weight disks to stay tightly stuck to the bar, allowing for increased movement and flexibility. Features: Features 12 separate weight disks. Style: The modern black and chrome design will tie in nicely with any workout room or garage. Dumbbell Weight Set With Barbell Adaptor | Black | Living Social