the shipping for this item be quick which I always appreciate . however , the product itself be a waste . I think I would really enjoy use this dumbbell , but I just do not . I feel like I could have do the same excercise with a regular dumbbell or any item with a little weight on it . this be a complete disappointment . believe I , I try to convince myself that this thing be work and worth invest in , but in the end , it be just ... nothing .