55LB 5 in 1 Single Adjustable Dumbbell Free Dumbbell Weight Adjust with Anti-Slip Metal Handle, 05224593Five In One Weights Training: You only need single dumbbells, you can have 5 sets of dumbbell training experience, the weight can be adjusted according to your own level, this cleverly designed adjustable dumbbell meets fitness hobbies the needs of practitioners and professional weight trainers. 1 Second Weights Change: Turn the handle with one hand to quickly adjust to the required weight. There will be a corresponding pointer and a click sound to