I have a whole set of these , from 10 pounder to 45 pounder . they be a great fitness aid , as they be immensely portable and can be use in any room of the house , while watch tv , or next to you computer desk . there be a wealth of exercise one can do with simple dumbell : curl , bent rowing , overhead extension , etc. . if you have a bench , there be even more . believe it or not , a home body builder can get a pretty decent workout from a limited set of these dumbell . they be relatively cheap compare to other brand . I recommend they . Jim `` Konedog '' Koenig