Wrist strengthening is a great idea. But what is the advantage of going to great lengths to find this very specific (and probably expensive) product versus buying a $19.99 dumbell set at Walmart and using the lightest weight at one end? I ask this question seriously, since these are the days of reduce/ reuse/ recycle. I use a dumbell leftover from my brother's York set from 1983. It works fine and it didn't cost me a cent.