We bought our dumbells back in 2008, and they have lasted without any issues. Often we have clients ask if they are new. We never have to worry about the safety of our clients, because this product is one solid piece. Gone are the days of twisting them to keep them together. These are BUILT to LAST!
We have since purchased barbells and ez-bar curls. These are the same solid piece. And our barbells have copper plating to keep everyone safe from bacteria.
HIGHLY recommend any of these product.