AOTOB Adjustable Weight Dumbbells, 55 lbs Single Dumbbell for Men and Women with Anti-Slip Fast Adjust Turning Handle, Durable Dumbbell Suitable for Home Gym Exercise and Workout Fitness3 Seconds Weights Change: One handed operation design, convenient for fast changing dumbbells' weight during training. Turn the handle with one hand, adjust to desirable weights in 3 seconds. 55 lbs Adjustable Dumbbell: adjust weight from 11 lbs to 55 lbs, suitable for professional and beginner, bring rich exercises feeling during training for both. 55 lbs Adjustable Dumbbell: adjust weight from 11 lbs to 55 lbs, suitable for professional and